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 |
Which one of the following diagrams represents the placentation in Dianthus?
1. | 2. | ||
3. | 4. |
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 |
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 |
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
Besides paddy fields, cyanobacteria are also found inside vegetative part of:
1. | Cycas | 2. | Equisetum |
3. | Psilotum | 4. | Pinus |
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
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
Casparian strips occur in
1. | Epidermis | 2. | Pericycle |
3. | Cortex | 4. | Endodermis |
The cork cambium, cork and secondary cortex are collectively called
1. Phelloderm
2. Phellogen
3. Periderm
4. Phellem
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 |
Identify the wrong statement in the context of heartwood:
1. It is highly durable
2. It conducts water and minerals efficiently
3. It comprises dead elements with highly lignified walls
4. Organic compounds are deposited in it
Which one of the following is not an inclusion body found in prokaryotes?
1. | Phosphate granule | 2. | Cyanophycean granule |
3. | Glycogen granule | 4. | Polysome |
1. | Phylogeny | 2. | Ancestry |
3. | Palaeontology | 4. | Ontogeny |
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
Which of the following is the correct floral formula of Liliaceae?
1. | |
2. | |
3. | |
4. |
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.
Whorled, simple leaves with reticulate venation
are present in :
1. | Alstonia | 2. | Calotropis |
3. | Neem | 4. | China Rose |
Plasmodesmata are
1. Connections between adjacent plant cells
2. Lignified cemented layers between cells
3. Locomotory structures
4. Membranes connecting the nucleus with plasmalemma
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) |
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 |
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 |
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 |
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. |
Regeneration of damaged growing grass following grazing is largely due to :
1. Lateral meristem
2. Apical meristem
3. Intercalary meristem
4. Secondary meristem
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 |
The causative agent of mad-cow disease is a:
1. bacterium
2. prion
3. worm
4. virus
During cell growth, DNA synthesis takes place in
1. | M phase | 2. | S Phase |
3. | G1 phase | 4. | G2 phase |
A competitive inhibitor of succinic dehydrogenase is:
1. | malonate | 2. | oxaloacetate |
3. | α-ketoglutarate | 4. | malate |
Which of the following are not secondary metabolites in plants?
1. | Vinblastin, curcumin | 2. | Rubber, gums |
3. | Morphine, codeine | 4. | Amino acids, glucose |
The aleurone layer in maize grain is especially rich in:
1. | Proteins | 2. | Starch |
3. | Lipids | 4. | Auxins |
Stomata in grass leaf are
1. | Dumb-bell shaped | 2. | Barrel shaped |
3. | Rectangular | 4. | Kidney shaped |
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 |
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
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 |
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
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
Which of the following statements about cork cambium is incorrect?
1. | It forms a secondary cortex on its outside |
2. | It forms a part of periderm |
3. | It is responsible for the formation of lenticels |
4. | It is a couple of layers thick |
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) |
Water-soluble pigments found in plant cell vacuoles are:
1. | chlorophylls | 2. | carotenoids |
3. | anthocyanins | 4. | xanthophylls |
Zygotic meiosis is characteristic of
1. Fucus
2. Funaria
3. Chlamydomonas
4. Marchantia
Aestivation of petals in the flower of cotton is correctly shown in:
1. | 2. | ||
3. | 4. |
In ferns, Meiosis takes place at the time of:
1. Spore formation
2. Spore germination
3. Gamete formation
4. Antheridia and archegonia formation
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 |
Difference in gram ⊕ and gram bacteria is due to-
1. | Cell wall | 2. | Cell membrane |
3. | Ribosome | 4. | Cytoplasm |
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. |
Functional megaspore in an angiosperm develops into:
1. | Ovule | 2. | Endosperm |
3. | Embryo sac | 4. | Embryo |
Sweet potato is a modified
1. Stem
2. Adventitious root
3. Tap root
4. Rhizome
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 |
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 |
Air bladder is found in:
1. | Osteichthyes | 2. | Aves |
3. | Cyclostomata | 4. | Chondrichthyes |
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
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. |
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
Which one of the following structural formulae of two organic compounds are correctly identified along with its related function?
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
Dissolution of the synaptonemal complex occurs during :
1. | Zygote | 2. | Diplotene |
3. | Leptotene | 4. | Pachytene |
Identify the basic amino acid from the following:
1. Glutamic Acid
2. Lysine
3. Valine
4. Tyrosine
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
What is common between parrot, platypus and kangaroo?
1. | toothless jaws | 2. | functional post-anal tail |
3. | ovoparity | 4. | homoiothermy |
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. |
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 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
A marine cartilaginous fish that can produce electric current is:
1. | Pristis | 2. | Torpedo |
3. | Trygon | 4. | Scoliodon |
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
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 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 |
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
Given below is the diagrammatic sketch of a certain type of connective tissue. Identify the parts labelled A, B, C and D, and select the right option about them.
Part A | Part B | Part C | Part D | |
1. | Macrophage | Fibroblast | Collagen fibres | Mast cell |
2. | Mast cell | Macrophage | Fibroblast | Collagen fibres |
3. | Macrophage | Collagen fibres | Fibroblast | Mast cell |
4. | Mast cell | Collagen fibres | Fibroblast | Macrophage |
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. |
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 |
Which of the following features is not present in the Phylum - Arthropoda?
1. Jointed appendages
2. Chitinous exoskeleton
3. Metameric segmentation
4. Parapodia
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) |
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
Which one of the following groups of animals is bilaterally symmetrical and triploblastic?
1. Sponges
2. Coelenterates (cnidarians)
3. Aschelminthes (round worms)
4. Ctenophores
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 |
The kind of epithelium which forms the inner walls of blood vessels is:
1. cuboidal epithelium
2. columnar epithelium
3. ciliated columnar epithelium
4. squamous epithelium
"Ramachandran plot" is used to confirm the structure of
1. | RNA | 2. | Proteins |
3. | Triacylglycerides | 4. | DNA |
What is true for Mammalia:
1. | Platypus is oviparous |
2. | Bats have feather |
3. | Elephant is ovoviviparous |
4. | Diaphragm is absent in them |
Hollow-air filled bones (pneumatic bones) occur in:
1. | Mammals | 2. | Reptiles |
3. | Urodela | 4. | Aves |
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) |
Extranuclear DNA is found in:
1. Lysosome and chloroplast
2. Chloroplast and mitochondria
3. Mitochondria and lysosome
4. Golgi and E.R.
Important site for formation of glycoproteins and glycolipids:
1. Golgi apparatus
2. plastid
3. lysosome
4. vacuole
Lysosome contains:
1. | Oxidative enzymes | 2. | Hydrolytic enzymes |
3. | Reductive enzymes | 4. | Anabolic enzymes |
Which one of the following belongs to the family Muscidae?
1. | Cockroach | 2. | House fly |
3. | Fire fly | 4. | Grasshopper |
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 |
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
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
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 four sketches (A, B, C, and D) given below, represent four different types of animal tissues. Which one of these is correctly identified in the options given, along with its correct location and function?
Tissue | Location | Function | ||
1. | (C) | Collagen fibres | Cartilage | Attach skeletal muscles to bones |
2. | (D) | Smooth muscle tissue | Heart | Heart contraction |
3. | (A) | Columnar epithelium | Nephron | Secretion and absorption |
4. | (B) | Glandular epithelium | Intestine | Secretion |
After meiosis I, the resultant daughter cells have
1. same amount of DNA as in the parent cell in S
2. twice the amount of DNA in comparison to haploid gamete
3. same amount of DNA in comparison to haploid gamete
4. four times the amount of DNA in comparison to haploid gamete
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
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 given below:
1. | (e) only | 2. | (a), (d) and (c) only |
3. | (b) and (c) only | 4. | (a) and (c) only |
Bilaterally symmetrical and acoelomate animals are exemplified by:
1. | Platyhelminthes | 2. | Aschelminthes |
3. | Annelida | 4. | Ctenophora |
Which of the following is correctly stated as it happens in the common cockroach?
1. Oxygen is transported by hemoglobin in blood
2. Nitrogenous excretory product is urea
3. The food is ground by mandibles and gizzard
4. Malpighian tubules are excretory organs projecting out from the colon
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 statements is INCORRECT ?
1. Cockroaches exhibit mosaic vision with less sensitivity and more resolution
2. A mushroom-shaped gland is present in the 6th-7th abdominal segments of male
3. A pair of spermatheca is present in the 6th segment of female cockroach
4. Female cockroach possesses sixteen ovarioles in the ovaries
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 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 |
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 |