Viroids differ from viruses in having
1. DNA molecules with protein coat
2. DNA molecules without protein coat
3. RNA molecules with protein coat
4. RNA molecules without protein coat
Consider the following statements:
(A) | Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group |
(B) | A complete catalytic enzyme with its bound prosthetic group is called apoenzyme |
Select the correct option
1. (A) is False but (B) is True
2. Both (A) and (B) are True
3. (A) is True but (B) is False
4. Both (A) and (B) are False
Which one of the following is a correct statement?
1. | Pteridophyte gametophyte has a protonemal and leafy stage |
2. | In gymnosperms female gametophyte is free-living |
3. | Antheridiophores and protonema are present in pteridophytes |
4. | Origin of seed habit can be traced in pteridophytes |
Functional megaspore in an angiosperm develops into:
1. | Ovule | 2. | Endosperm |
3. | Embryo sac | 4. | Embryo |
Pinus seed cannot germinate and establish without fungal association. This is because:
1. its seeds contain inhibitors that prevent germination.
2. its embryo is immature.
3. it has obligate association with mycorrhizae.
4. it has very hard seed coat.
Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :
1. Tyloses in vessels
2. Closure of stomata
3. Flaccidity of bulliform cells
4. Shrinkage of air spaces in spongy mesophyll
During cell growth, DNA synthesis takes place in
1. | M phase | 2. | S Phase |
3. | G1 phase | 4. | G2 phase |
Which one of the following is considered important in the development of seed habit?
1. | Dependent sporophyte | 2. | Heterospory |
3. | Halplontic life cycle | 4. | Free-living gametophyte |
Which one of the following diagrams represents the placentation in Dianthus?
1. | 2. | ||
3. | 4. |
Select the wrong statement :
1. | Anisogametes differ either in structure, function or behaviour |
2. | In Oomycetes, female gamete is smaller and motile, while male gamete is larger and non-motile |
3. | Chlamydomonas exhibits both isogamy and anisogamy and Fucus shows oogamy |
4. | Isogametes are similar in structure, function and behaviour |
Extranuclear DNA is found in:
1. Lysosome and chloroplast
2. Chloroplast and mitochondria
3. Mitochondria and lysosome
4. Golgi and E.R.
Which of the following are not secondary metabolites in plants?
1. | Vinblastin, curcumin | 2. | Rubber, gums |
3. | Morphine, codeine | 4. | Amino acids, glucose |
Select the correctly written scientific name of Mango which was first described by Carolus Linnaeus:
1. | Mangifera Indica | 2. | Mangifera indica Car. Linn. |
3. | Mangifera indica Linn. | 4. | Mangifera indica |
"Ramachandran plot" is used to confirm the structure of
1. RNA | 2. Proteins |
3. Triacylglycerides | 4. DNA |
Which of the following statements is wrong?
1. | Both chloroplasts and mitochondria have an internal compartment or the thylakoid space bounded by the thylakoid membrane. |
2. | Both chloroplasts and mitochondria contain DNA. |
3. | The chloroplasts are generally much larger than mitochondria. |
4. | Both chloroplasts and mitochondria are covered by double membrane. |
The major portion of the dry weight of plants comprises of: -
1. Nitrogen, phosphorus, and potassium
2. Calcium, magnesium, and sulphur
3. Carbon, nitrogen, and hydrogen
4. Carbon, hydrogen, and oxygen
Lysosome contains:
1. Oxidative enzymes | 2. Hydrolytic enzymes |
3. Reductive enzymes | 4. Anabolic enzymes |
Dissolution of the synaptonemal complex occurs during :
1. | Zygote | 2. | Diplotene |
3. | Leptotene | 4. | Pachytene |
Difference in gram ⊕ and gram bacteria is due to-
1. | Cell wall | 2. | Cell membrane |
3. | Ribosome | 4. | Cytoplasm |
Which one of the following is not an inclusion body found in prokaryotes?
1. | Phosphate granule | 2. | Cyanophycean granule |
3. | Glycogen granule | 4. | Polysome |
Given below is the diagrammatic representation of one of the categories of small molecular weight organic compounds in the living tissues. Identify the category shown and the one blank component X in it :
1. Category: Cholesterol; Component: Guanine
2. Category: Amino acid; Component: NH2
3. Category: Nucleotide; Component: Adenine
4. Category: Nucleoside; Component: Uracil
Which one of the following statements is wrong?
1. Golden algae are also called desmids
2. Eubacteria are also called false bacteria.
3. Phycomycetes are also called algal fungi.
4. Cyanobacteria are also called blue-green algae.
Which one of the following is a xerophytic plant in which the stem is modified into a flat green and succulent structure –
1. | Casuarina | 2. | Hydrilla |
3. | Acacia | 4. | Opuntia |
Aestivation of petals in the flower of cotton is correctly shown in:
1. | 2. | ||
3. | 4. |
A stage in cell division is shown in the figure. Select the answer which gives the correct identification of the stage with its characteristics.
Stages | Description | |
1. | Telophase | Nuclear envelop reforms, Golgi complex reforms |
2. | Late anaphase | Chromosomes move away from equatorial plate, Golgi complex not present |
3. | Cytokinesis | Cell plate formed, mitochondria distributed between two daughter cells |
4. | Telophase | Endoplasmic reticulum and nucleolus not reformed yet |
Match the Column I with Column II.
Column I | Column II | ||
(a) | Golgi apparatus | (i) | Synthesis of protein |
(b) | Lysosomes | (ii) | Trap waste and excretory products |
(c) | Vacuoles | (iii) | Formation of glycoproteins and glycolipids |
(d) | Ribosomes | (iv) | Digesting biomolecules |
Choose the right match from options given below:
(a) | (b) | (c) | (d) | |
1. | (iii) | (iv) | (ii) | (i) |
2. | (iv) | (iii) | (i) | (ii) |
3. | (iii) | (ii) | (iv) | (i) |
4. | (i) | (ii) | (iv) | (iii) |
In ferns, Meiosis takes place at the time of:
1. Spore formation
2. Spore germination
3. Gamete formation
4. Antheridia and archegonia formation
Given below is the diagram of a bacteriophage. In which one of the options all the four parts A, B, C and D are correct –
Options
A | B | C | D | |
1. | Sheath | Collar | Head | Tail fibres |
2. | Head | Sheath | Collar | Tail fibres |
3. | Collar | Tail fibres | Head | Sheath |
4. | Tail fibres | Head | Sheath | Collar |
Casparian strips occur in
1. | Epidermis | 2. | Pericycle |
3. | Cortex | 4. | Endodermis |
Moss peat is used as a packing material for sending flowers and live plants to distant places because:
1. | it is easily available | 2. | it is hygroscopic |
3. | it reduces transpiration | 4. | it serves as a disinfectant |
Vacuole in a plant cell
1. | is membrane-bound and contains storage proteins and lipids |
2. | is membrane-bound and contains water and excretory substances |
3. | lacks membrane and contains air |
4. | lacks membrane and contains water and excretory substances |
Plasmodesmata are
1. Connections between adjacent plant cells
2. Lignified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma
Whorled, simple leaves with reticulate venation
are present in :
1. | Alstonia | 2. | Calotropis |
3. | Neem | 4. | China Rose |
Ciliates differ from all other protozoans in?
1. | using flagella for locomotion |
2. | having a contractile vacuole for removing excess water |
3. | using pseudopodia for capturing prey |
4. | having two types of nuclei |
Barophilic prokaryotes-
1. | Grow slowly in highly alkaline frozen lakes at high altitudes |
2. | Grow and multiply in very deep marine sediments |
3. | Readily grow and divide in sea water enriched in any soluble salt of barium |
4. | Occur in water containing high concentrations of barium hydroxide |
Pick up the wrong statement.
1. | Cell wall is absent in Animalia. |
2. | Protista have photosynthetic and heterotrophic modes of nutrition |
3. | Some fungi are edible |
4. | Nuclear membrane is present in Monera. |
What is true about ribosomes?
1. | The prokaryotic ribosomes are 80S, where "S" stands for sedimentation coefficient |
2. | These are composed of ribonucleic acid and proteins |
3. | These are found only in eukaryotic cells |
4. | These are self-splicing introns of some RNAs |
Pentamerous actinomorphic flowers, bicarpellary ovary with oblique septum and a fruit of capsule or berry, belong to the family
1. | Liliaceae | 2. | Asteraceae |
3. | Brassicaceae | 4. | Solanaceae |
In oogamy, fertilization involves:
1. | A large non-motile female gamete and a small motile male gamete |
2. | A large non-motile female gamete and a small non-motile male gamete |
3. | A large motile female gamete and a small non-motile male gamete |
4. | A small non-motile female gamete and a large motile male gamete |
Water soluble pigments found in plant cell vacuoles are
1. | chlorophylls | 2. | carotenoids |
3. | anthocyanins | 4. | xanthophylls |
Which one of the following structural formulae of two organic compounds are correctly identified along with its related function?
1. A- Triglyceride – a major source of energy
2. B- Uracil – a component of DNA
3. A- Lecithin – a component of cell membrane
4. B- Adenine – a nucleotide that makes up nucleic acids
Cellular organelles with membranes are
1. Nucleus, ribosome and mitochondria
2. Chromosomes, ribosome and endoplasmic reticulum
3. Endoplasmic reticulum, ribosome and nuclei
4. Lysosomes, Golgi apparatus and mitochondria
Select the correct pair.
1. | Cells of medullary rays that form part of a cambial ring - Interfascicular cambium |
2. | Loose parenchyma cells rupturing the epidermis and forming a lens-shaped opening in the bark - Spongy parenchyma |
3. | Large colourless empty cells in the epidermis of grass leaves - Subsidiary cells |
4. | In dicot leaves, vascular bundles are surrounded by large thick-walled cells - Conjunctive tissue |
Stomata in grass leaf are
1. | Dumb-bell shaped | 2. | Barrel shaped |
3. | Rectangular | 4. | Kidney shaped |
Species are considered as:
1. | Real basic units of classification |
2. | The lowest units of classification |
3. | The artificial concept of the human mind which cannot be defined in absolute terms |
4. | Real units of classification devised by taxonomists |
Two plants can be conclusively said to belong to the same species if they:
1. | can reproduce freely with each other and form seeds |
2. | have more than 90 per cent similar genes |
3. | look similar and possess identical secondary metabolites |
4. | have same number of chromosomes |
Besides paddy fields, cyanobacteria are also found inside vegetative part of:
1. | Cycas | 2. | Equisetum |
3. | Psilotum | 4. | Pinus |
The aleurone layer in maize grain is especially rich in:
1. | Proteins | 2. | Starch |
3. | Lipids | 4. | Auxins |
Evolutionary history of an organism is known as:
1. | Phylogeny | 2. | Ancestry |
3. | Palaeontology | 4. | Ontogeny |
Given below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
1. Prophase-I during meiosis
2. Prophase-II during meiosis
3. Prophase of mitosis
4. Both prophase and metaphase of mitosis
Cuboidal epithelium with brush border of microvilli is found in :
1. Ducts of salivary glands
2. Proximal convoluted tubule of nephron
3. Eustachian tube
4. Lining of intestine
What is true for Mammalia:
1. Platypus is oviparous
2. Bats have feather
3. Elephant is ovoviviparous
4. Diaphragm is absent in them
Important site for formation of glycoproteins and glycolipids:
1. Golgi apparatus | 2. plastid |
3. lysosome | 4. vacuole |
Bilaterally symmetrical and acoelomate animals are exemplified by:
1. | Platyhelminthes | 2. | Aschelminthes |
3. | Annelida | 4. | Ctenophora |
Hollow-air filled bones (pneumatic bones) occur in:
1. Mammals | 2. Reptiles |
3. Urodela | 4. Aves |
Select the wrong statement.
1. | Mycoplasma is a wall-less microorganism |
2. | Bacterial cell wall is made up of peptidoglycan |
3. | Pili and fimbriae are mainly involved in motility of bacterial cells |
4. | Cyanobacteria lack flagellated cells |
Select the correct combination of the statements (a-d) regarding the characteristics of certain organisms:
(a) | Methanogens are archaebacteria that produce methane in marshy areas |
(b) | Nostoc is a filamentous blue-green alga that fixes atmospheric nitrogen |
(c) | Chemosynthetic autotrophic bacteria synthesize cellulose from glucose |
(d) | Mycoplasma lack a cell wall and can survive without oxygen |
The correct statements are:
1. | (a), (b) and (c) | 2. | (b), (c) and (d) |
3. | (a), (b) and (d) | 4. | (b) and (c) |
Which one of the following statements about all the four - Spongilla, Leech, Dolphin, Penguin - is correct?
1. | Leech is a freshwater form while all others are marine. |
2. | Spongilla has special collar cells called choanocytes, not found in the remaining three. |
3. | All are bilaterally symmetrical. |
4. | Penguin is homeothermic while the remaining three are poikilothermic. |
Which one of the following belongs to the family Muscidae?
1. Cockroach | 2. House fly |
3. Fire fly | 4. Grasshopper |
Which arrangement is in correct ascending order:
1. Species < genus < order < family
2. Genus < species < family < order
3. Order < family < genus < species
4. Species < genus < family < order
Which of the following represents the correct combination without any exception?
Characteristic | Class |
(a) Mammary gland; hair on body; pinnae; two pairs of limbs | Mammalia |
(b) Mouth ventral; gills without operculum; skin with placoid scales; persistent notochord | Chondrichthyes |
(c) Sucking and circular mouth; jaws absent; integument without scales; paired appendages | Cyclostomata |
(d) Body covered with feathers; skin moist and glandular; lungs with air sacs; fore limbs from wings | Aves |
1. | a | 2. | b |
3. | c | 4. | d |
Assertion (A): | All vertebrates are chordates but all chordates are not vertebrates. |
Reason (R): | Notochord is replaced by vertebral column in the adult vertebrates. |
1. | (A) is False but (R) is True. |
2. | Both (A) and (R) are True and (R) correctly explains (A). |
3. | Both (A) and (R) are True and (R) does not correctly explain (A). |
4. | (A) is True but (R) is False. |
Select the correct option with respect to mitosis.
1. | Chromatids start moving towards opposite poles in telophase. |
2. | Golgi complex and endoplasmic reticulum are still visible at the end of prophase. |
3. | Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase. |
4. | Chromatids separate but remain in the center of the cell in anaphase. |
The chitinous exoskeleton of arthropods is formed by the polymerisation of–
1. D- glucosamine
2. N- acetyl glucosamine
3. Lipoglycans
4. Keratin sulphate and chondroitin sulphate
Choose the wrong statement:
1. | Neurospora is used in the study of biochemical genetics |
2. | Morels and truffles are poisonous mushrooms |
3. | Yeast is unicellular and useful in fermentation |
4. | Penicillium is multicellular and produces antibiotics |
A phosphoglyceride is always made up of
1. | only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. |
2. | a saturated or unsaturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. |
3. | a saturated or unsaturated fatty acid esterified to a phosphate group which is also attached to a glycerol molecule. |
4. | only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached. |
Which of the following ribosomes are engaged in protein synthesis in animal cell ?
1. Ribosomes which occur on nuclear membrane and E.R.
2. Ribosomes of only cytosol
3. Ribosomes of only nucleolus and cytosol
4. Ribosomes of only mitochondria and cytosol
Which of the following cell organelles is present in the highest number in secretory cells?
1. | Mitochondria | 2. | Golgi complex |
3. | Endoplasmic reticulum | 4. | Lysosomes |
Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
1. Sponges
2. Coelenterates (cnidarians)
3. Aschelminthes (round worms)
4. Ctenophores
A competitive inhibitor of succinic dehydrogenase is:
1. | malonate | 2. | oxaloacetate |
3. | α-ketoglutarate | 4. | malate |
Which one of the following features are not true for chordates?
(a) Heart is dorsal.
(b) Pharynx is perforated by gill slits.
(c) Central nervous system is ventral, solid and single.
(d) Post-anal tail is present.
(e) Notochord is present.
Choose the most appropriate answer from the option give below:
1. | (e) only | 2. | (a), (d) and (c) only |
3. | (b) and (c) only | 4. | (a) and (c) only |
Match the following column I with column II.
Column I | Column II | ||
A. | Synapsis aligns homologous chromosomes | 1. | Anaphase II |
B. | Synthesis of RNA and protein | 2. | Zygotene |
C. | Action of enzyme recombinase | 3. | G2 - phase |
D. | Centromeres do not separate, but chromatids move towards opposite poles | 4. | Anaphase I |
5. | Pachytene |
A | B | C | D | |
1. | 2 | 1 | 3 | 4 |
2. | 2 | 3 | 5 | 4 |
3. | 1 | 2 | 5 | 4 |
4. | 2 | 3 | 4 | 5 |
1. Both lipids and proteins can flip-flop
2. While lipids can rarely flip-flop, proteins cannot
3. While proteins can flip-flop, lipids cannot
4. Neither lipids, nor proteins can flip-flop
Match the following columns and select the correct option :
Column - I | Column - II | ||
(a) | Aptenodytes | (i) | Flying fox |
(b) | Pteropus | (ii) | Angel fish |
(c) | Pterophyllum | (iii) | Lamprey |
(d) | Petromyzon | (iv) | Penguin |
(a) | (b) | (c) | (d) | |
1. | (iii) | (iv) | (ii) | (i) |
2. | (iii) | (iv) | (i) | (ii) |
3. | (iv) | (i) | (ii) | (iii) |
4. | (ii) | (i) | (iv) | (iii) |
Which one out of A-D given below correctly represents the structural formula of the basic amino acid?
A | B |
C | D |
1. | C | 2. | D |
3. | A | 4. | B |
Air bladder is found in :
A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has
1. | Twice the number of chromosomes and twice the amount of DNA |
2. | Same number of chromosomes but twice the amount of DNA |
3. | Twice the number of chromosomes and four times the amount of DNA |
4. | Four times the number of chromosomes and twice the amount of DNA |
The contrasting characteristics generally in a pair used for identification of animals in Taxonomic Key are referred to as :
1. | Lead | 2. | Couplet |
3. | Doublet | 4. | Alternate |
Metagenesis refers to?
1. | The presence of different morphic forms |
2. | Alternation of generation between asexual and sexual phrases of an organism |
3. | Occurrence of a drastic change in the form during post-embryonic development |
4. | Presence of segmented body and parthenogenic mode of reproduction |
Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?
1. | Reptilia: possess 3 - chambered heart with one incompletely divided ventricle |
2. | Chordata: possess a mouth provided with an upper and lower jaw |
3. | Chondrichthyes: possess cartilaginous endoskeleton |
4. | Mammalia: give birth to young one |
Which of the following features is not present in the Phylum - Arthropoda?
1. | Jointed appendages | 2. | Chitinous exoskeleton |
3. | Metameric segmentation | 4. | Parapodia |
What is common between parrot, platypus and kangaroo?
1. | toothless jaws | 2. | functional post-anal tail |
3. | ovoparity | 4. | homoiothermy |
Select the correct statement from the following regarding cell membrane:
1. | Na+ and K+ ions move across cell membrane by passive transport |
2. | Proteins make up 60% to 70% of the cell membrane |
3. | Lipids are arranged in a bilayer with polar heads towards the inner part |
4. | Fluid mosaic model of cell membrane was proposed by Singer and Nicolson |
Match the name of the animal (Column I), with one characteristic (Column II), and the phylum/class
(Column III) to which it belongs:
Column I | Column II | Column II | |
1. | Ichthy ophis | terrestrial | Reptilia |
2. | Limulus | body covered by chitinous exoskeleton | Pisces |
3. | Adamsia | radially symmetrical | Porifera |
4. | Petromyzon | ectoparasite | Cyclostomata |
Read the following statements.
(i) | Lower the taxon, more are the characteristics that the members within the taxon share. |
(ii) | Order is the assemblage of genera which exhibit a few similar characters. |
(iii) | Cat and dog are included in the same family Felidae. |
(iv) | Binomial Nomenclature was introduced by Carolus Linnaeus. |
Which of the following statements are not correct?
1. | (i), (ii) and (iii) | 2. | (ii), (iii) and (iv) |
3. | (i) and (iv) | 4. | (ii) and (iii) |
A marine cartilaginous fish that can produce electric current is:
1. | Pristis | 2. | Torpedo |
3. | Trygon | 4. | Scoliodon |
Identify the phylum where the body cavity is not lined by mesoderm, instead, the mesoderm is present as scattered pouches between ectoderm and endoderm :
1. | Cnidaria | 2. | Platyhelminthes |
3. | Mollusca | 4. | Aschelminthes |
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:
1. | Sub-metacentric | 2. | Acrocentric |
3. | Metacentric | 4. | Telocentric |
Read the following statements.
(a) | Metagenesis is observed in Helminths. |
(b) | Echinoderms are triploblastic and coelomate animals. |
(c) | Round worms have organ-system level of body organization. |
(d) | Comb plates present in ctenophores help in digestion. |
(e) | Water vascular system is characteristic of Echinoderms. |
Choose the correct answer from the options given below.
1. (a), (d) and (e) are correct
2. (b), (c) and (e) are correct
3. (c), (d) and (e) are correct
4. (a), (b) and (c) are correct
About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and
1. phosphorus and sulphur | 2. sulphur and magnesium |
3. magnesium and sodium | 4. calcium and phosphorus |
Match List - I with List - II
List - I | List - II | ||
(a) | Metamerism | (i) | Coelenterata |
(b) | Canal system | (ii) | Ctenophora |
(c) | Comb Plates | (iii) | Annelida |
(d) | Cnidoblasts | (iv) | Porifera |
Choose the correct answer from the options given below.
(a) | (b) | (c) | (d) | |
1. | (iii) | (iv) | (ii) | (i) |
2. | (iv) | (i) | (ii) | (iii) |
3. | (iv) | (iii) | (i) | (ii) |
4. | (iii) | (iv) | (i) | (ii) |
Identify the basic amino acid from the following:
1. | Glutamic Acid | 2. | Lysine |
3. | Valine | 4. | Tyrosine |
The causative agent of mad-cow disease is a:
1. | bacterium | 2. | prion |
3. | worm | 4. | virus |
Consider the following features:
(a) Organ system level of organization
(b) Bilateral symmetry
(c) True coelomates with the segmentation of the body
Select the correct option of animal groups that possess all the above characteristics.
1. Annelida, Mollusca and Chordata
2. Annelida, Arthropoda, and Chordata
3. Annelida, Arthropoda, and Mollusca
4. Arthropoda, Mollusca, and Chordata
Which of the following options does correctly represent the characteristic features of phylum Annelida?
1. | Triploblastic, unsegmented body, and bilaterally symmetrical. |
2. | Triploblastic, a segmented body, and bilaterally symmetrical. |
3. | Triploblastic, flattened body, and acoelomate condition. |
4. | Diploblastic, mostly marine and radially symmetrical. |
Which of the following statements are true for the phylum-Chordata?
(a) | In Urochordata, notochord extends from head to tail and it is present throughout their life |
(b) | In Vertebrata, notochord is present during the embryonic period only |
(c) | Central nervous system is dorsal and hollow |
(d) | Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata |
1. | (c) and (a) | 2. | (a) and (b) |
3. | (b) and (c) | 4. | (d) and (c) |
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:
1. Eubacteria | 2. Halophiles |
3. Thermoacidophiles | 4. Methanogens |
Which one of the following organelle in the figure correctly matches with its function?
1. | Golgi apparatus, protein synthesis |
2. | Golgi apparatus, formation of glycolipids |
3. | Rough endoplasmic reticulum, protein synthesis |
4. | Rough endoplasmic reticulum, formation of glycoproteins |
Which among these is the correct combination of aquatic mammals?
1. | Dolphin, Seals, Trygon | 2. | Whales, Dolphin, Seals |
3. | Trygon, Whales, Seals | 4. | Seals, Dolphin, Sharks |
Which of the following options gives the correct sequence of events during mitosis?
1. | Condensation, nuclear membrane disassembly, arrangement at equator, centromere division, segregation, telophase |
2. | Condensation, crossing over, nuclear membrane disassembly, segregation, telophase |
3. | Condensation, centromere division, segregation, arrangement at equator, telophase |
4. | condensation, nuclear membrane disassembly, crossing over, segregation, telophase |