Assuming independent assortment, the percent of progeny with genotype AABb from a cross AaBb X AaBb is expected to be:
1. | 7.5 | 2. | 15 |
3. | 12.5 | 4. | 30 |
For the synthesis of one glucose molecule, the number of ATP and NADPH used in Calvin cycle respectively are:
1. 12 and 12
2. 12 and 18
3. 18 and 12
4. 18 and 18
Ultimately the size of a population in a given area is determined by:
1. | the biotic potential |
2. | mortality rates and natality rates |
3. | carrying capacity of its environment |
4. | rate of immigration and emigration |
Which of the following pairs is not correctly matched?
1. |
Cnidocyte |
Ctenophora |
2. |
Stomochord |
Hemichordates |
3. |
Notochord |
Protochordates |
4. |
Radula |
Mollusks |
In a food chain, the transition from an earlier trophic level to the next trophic level will lead to:
1. | a gain of 50% of energy | 2. | a gain of 1% of energy |
3. | a loss of 90% of energy | 4. | a loss of 10% of energy |
Which of the following controls the uptake of mineral ions into the xylem in vascular plants?
1. Cells in the epidermis
2. Cells in the ground tissue
3. Endodermal cells
4. Cells in the pericycle
A linear sequence of amino acids in a peptide or a protein describes its:
1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quaternary structure
Consider the two statements:
I. If the head of a cockroach is cut off, it will still live for as long as one week.
II. The endocrine hormones can take over the function of neural tissue for short periods.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Both I and II are incorrect
Lignin is most likely to be found in the secondary walls of:
1. Parenchyma
2. Collenchyma
3. Sclerenchyma
4. Epidermis
Which of the following is regarded as the most perfect type of inflorescence?
1. Cyathium
2. Capitulum
3. Hypanthodium
4. Verticillaster
Which of the following would not be true for a typical plant cell?
1. | A cell wall composed of cellulose, hemicelluloses, and pectin. |
2. | A large vacuole that regulates turgor pressure. |
3. | The absence of flagella or centrioles, except in the gametes. |
4. | A freely permeable cell membrane. |
Identify the incorrect difference between a bryophyte and a pteridophyte:
|
Feature |
Bryophyte |
Pteridophyte |
1. |
Main plant body |
Gametophyte |
Sporophyte |
2. |
Vascular tissue |
Absent |
Present |
3. |
True roots |
Absent |
Present |
4. |
Transfer of antherozoids |
Water required |
Water not required |
Which stage of Prophase I of meiosis I is also sometimes called as the ‘bouquet’ stage?
1. Leptotene
2. Zygotene
3. Pachytene
4. Diplotene
Like other animals with bilateral symmetry, flatworms have:
1. an internal body cavity
2. segmented bodies
3. three germ layers
4. specialized circulatory and respiratory organs
An alternation of generation, with haploid and diploid multicellular phases in their life cycles, is exhibited by:
1. Volvox
2. Ectocarpus
3. Spirogyra
4. Fucus
The type of epithelium shown in the diagram is most likely to be found in the lining of:
1. Terminal Ileum
2. Fallopian tubes
3. Trachea
4. Urinary bladder
Stem tendrils are found in all the following plants except:
1. Peas
2. Cucumbers
3. Pumpkin
4. Watermelon
It can be very difficult to estimate the age of a tree with the help of annual rings in case it is located in:
1. Temperate evergreen
2. Temperate deciduous
3. Tropical evergreen
4. Tropical deciduous
Identify the incorrectly matched pair:
1. |
SA node |
Normal pacemaker |
2. |
AV node |
Conduction delay |
3. |
T wave on ECG |
Ventricular depolarization |
4. |
P wave on ECG |
Atrial depolarization |
The lengths of the filaments in the anther within a flower are variable in:
1. China rose
2. Pea
3. Mustard
4. Citrus
Mycoplasma are similar to Euglenoids in that both:
1. are obligate aerobes
2. are heterotrophs
3. lack a cell wall
4. cause harmful blooms in water bodies
What is the number of high energy bonds in an ATP molecule?
1. 0
2. 1
3. 2
4. 3
Consider the following statements:
I. The C4 pathway uses more energy than the C3 pathway during carbon fixation.
II. In C4 plants, every CO2 molecule has to be fixed twice, first in the mesophyll cells and second in the bundle sheath cells.
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Only I is correct
4. Both I and II are incorrect
The endomembrane system of a eukaryotic cell does not include:
1. Endoplasmic reticulum
2. Golgi apparatus
3. Lysosome
4. Mitochondria
Consider the following statements:
I. Reproduction is a seasonal event for most animals.
II. Seasonal availability of resources determines the time of reproduction.
1. Both I and II are correct and II explains I.
2. Both I and II are correct but II does not explain I.
3. Only I is correct.
4. Both I and II are incorrect.
Aves are chordates characterized by all the following except:
1. Bony endoskeleton with pneumatic long bones
2. Dry skin with oil gland at the base of the tail
3. Homoiothermy
4. Scales generally present on the fore limbs
PGR causing the closure of stomata in response to water stress is:
1. | ABA | 2. | Gibberellins |
3. | Auxin | 4. | Cytokinin |
Identify the option where all members in a row are not correctly matched:
The basal metabolic rate of most of the cells in the human body is directly under the control of:
1. TSH
2. Adrenaline
3. Cortisol
4. Iodothyronines
In a eukaryotic cell, the ribosomal proteins are synthesized in:
1. Cytoplasm
2. Nucleolus
3. Nucleus away from the nucleolus
4. Smooth endoplasmic reticulum
Oxidative phosphorylation in mitochondria is driven by energy from:
1. Sunlight
2. NADH
3. FADH2
4. Chemiosmosis of protons
Identify the incorrect statement:
1. All motor neurons innervating a single muscle fiber constitute a motor unit.
2. Cross bridges occur when myosin heads combine with the binding sites on actin.
3. The neurotransmitter that stimulates skeletal muscle is acetylcholine.
4. The area of the sarcomere that contains only thin and elastic filaments is the I band.
The study of karyotype is best done on cells arrested during cell division in:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
In all the classes of fungi, common feature will be:
1. Morphology of the mycelium
2. Mode of spore formation
3. Fruiting bodies
4. Mode of nutrition
Match each item in Column I with one in Column II and select the correct option from the codes given:
A. | ADH | P. | Vasoconstrictor, also stimulates adrenal cortex |
B. | Aldosterone | Q. | Regulates water reabsorption at collecting duct |
C. | Renin | R. | Catalyzes the formation of angiotensin I |
D. | Angiotensin II | S. | Promotes reabsorption of sodium at DCT |
A | B | C | D | |
1. | R | P | Q | S |
2. | Q | R | S | P |
3. | S | Q | P | R |
4. | Q | S | R | P |
You are using a plasmid to clone a gene of interest from a donor organism. Why is it desirable to use the same restriction enzyme to cut both the donor DNA and plasmid that also creates ‘sticky ends’?
1. | For easy identification of plasmids containing inserts |
2. | For easy identification of plasmids with antibiotic resistance |
3. | For easy insertion into plasmids of DNA segments from different sources |
4. | For ease of transformation |
Identify the incorrect statement regarding the ‘pericycle’:
1. It is a cylinder of parenchyma or sclerenchyma cells that lies just inside the endodermis and is the outer most part of the stele of plants.
2. Because it is composed of non-vascular parenchyma cells, it is not considered part of the vascular cylinder.
3. In eudicots, it also has the capacity to produce lateral roots.
4. In plants undergoing secondary growth, the pericycle contributes to the vascular cambium often diverging into a cork cambium.
In the diagram identify the cerebral aqueduct [Hint: NCERT says it passes through the midbrain]:
1. A
2. B
3. C
4. D
Maximum amount of water in the human alimentary canal is absorbed in:
1. Large intestine
2. Small intestine
3. Stomach
4. Buccal cavity
The number of cycles of mitotic cell divisions the megaspore goes through, before the embryo sac is fully formed is:
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
The chemical formula can be of:
1. Palmitic acid
2. Arachidonic acid
3. Cholesterol
4. Lecithin
When compared to their normal sized counterparts, the dwarf mutant varieties of a plant generally produce less:
1. | Auxins | 2. | Gibberellins |
3. | Ethylene | 4. | ABA |
Withdrawal of which of the following hormones is the most important cause of menstrual bleed?
1. FSH
2. LH
3. Estrogen
4. Progesterone
Which of the following hormones is secreted due to humoral [body fluids] stimulus?
1. ACTH | 2. Parathyroid hormone |
3. Testosterone | 4. Gonadotropins |
The natural selection operating as shown in the given figure is called as:
1. | Disruptive | |
2. | Directional | |
3. | Stabilizing | |
4. | Retrogressive |
In the peripheral blood smear shown in the diagram, identify the letters that show the main phagocytic cells:
1. A and E
2. B and C
3. C and D
4. D and E
What types of digestive hydrolytic enzymes are commonly secreted as zymogens [inactive precursors]?
1. Proteolytic
2. Carbohydrases
3. Lipases
4. Nucleases
The mode of inheritance of the trait shown in the given pedigree is MOST likely:
1. | X-linked recessive | 2. | Autosomal recessive |
3. | X-linked dominant | 4. | Autosomal dominant |
The type of synovial joint shown below [between lower end of humerus and ulna] is a:
1. Ball and socket joint
2. Pivot joint
3. Saddle joint
4. Hinge joint
In competitive enzyme inhibition, if the concentration of the substrate is increased, the rate of reaction:
1. will increase
2. will decrease
3. remains same
4. first increases than decreases
During biological nitrogen fixation, the cells of which of the following regions take part in the formation of nodules in roots for bacteroides?
1. Epidermis
2. Cortex
3. Endodermis
4. Vascular bundle
The Bowman's capsule and glomerulus constitute the:
1. Malpighian tubule | 2. Renal corpuscle |
3. Nephron | 4. Collecting system |
In the diagram showing the layers of retina, identify the bipolar cells [Hint: NCERT says – from inside to outside: ganglion cells, bipolar cells and photoreceptors; you can see photoreceptors in the diagram]:
1. A
2. B
3. C
4. D
The salient features of the Double-helix structure of DNA include all except:
1. | The two chains are anti-parallel |
2. | Complementary base pairing results in a uniform diameter of the helix |
3. | The two chains are coiled in a left-handed fashion |
4. | The pitch of the helix is 3.4 nm |
In present day, the most important cause driving animals and plants to extinction is:
1. Habitat loss and fragmentation
2. Over-exploitation
3. Alien species invasion
4. Co-extinctions
The most important advantage of micropropagation is:
1. | production of virus free plants |
2. | rapid production of a large number of genetically identical superior plants |
3. | creation of somaclonal variations for effective germplasm collection |
4. | production of transgenic plants |
Female heterogamety is seen in:
1. | Drosophila melanogaster |
2. | Many birds |
3. | Honey bee |
4. | Grasshopper |
The implantation of the human embryo on to wall of the uterus occurs at:
1. morula stage about 96 hours post fertilization
2. morula stage 7th / 8th day post fertilization
3. blastocyst stage 7th / 8th day post fertilization
4. blastocyst stage about 96 hours post fertilization
Energy flow and nutrient cycling are two important components of an ecosystem. What will be true comparison of the two?
1. | The amount of energy is much greater than the amount of nutrients |
2. | Organisms always need nutrients, but they don't always need energy |
3. | Nutrients are recycled, but energy is not |
4. | Organisms always need energy, but they don't always need nutrients |
Cirrhosis of liver is a complication of chronic abuse of:
1. | Alcohol | 2. | Nicotine |
3. | Morphine | 4. | Benzodiazepines |
Match each item in Column I [biocontrol agent] with one in Column II [pest controlled] and select the answer from the codes given:
|
Column I |
|
Column II |
A. |
Ladybird |
P. |
Mosquitoes |
B. |
Dragonflies |
Q. |
Aphids |
C. |
Trichoderma |
R. |
Fungus |
D. |
Baculoviruses |
S. |
Virus |
Codes
A |
B |
C |
D |
|
1. |
P |
Q |
R |
S |
2. |
Q |
P |
R |
S |
3. |
P |
Q |
S |
R |
4. |
Q |
P |
S |
R |
In the given diagram the respiratory center that moderates the functions of the rhythm center is shown by the letter:
1. A
2. B
3. C
4. Such center is not shown in the diagram
After pollination and fertilization, the ovule and the ovary, respectively, become:
1. | embryo and seed | 2. | seed and fruit |
3. | stigma and style | 4. | zygote and endosperm |
The most relevant abiotic ecological factor for organisms is:
1. | Temperature | 2. | Water |
3. | Light | 4. | Soil |
A biological process in which RNA molecules inhibit gene expression or translation, by neutralizing targeted mRNA molecules is known as:
1. | Bioprospecting | 2. | Molecular pharming |
3. | RNA interference | 4. | Insertional mutagenesis |
The most common component of biogas is:
1. | Carbon dioxide | 2. | Methane |
3. | Oxygen | 4. | Hydrogen sulfide |
Identify the incorrectly matched pair:
|
STI |
Causative agent |
1. |
Gonorrhoea |
Bacteria |
2. |
Syphilis |
Bacteria |
3. |
HIV |
Retrovirus |
4. |
Trichomoniasis |
Fungus |
The hormonal IUD, LNG-20, releases:
1. | Progesterone | 2. | Estrogen |
3. | FSH | 4. | LH |
In India, the name Ramesh Chandra Dagar, is associated with:
1. Organic farming
2. Conservation of forests
3. Recycling of plastic wastes
4. Preservation of water lands
Identify the correct statement regarding phenylketonuria:
1. | The affected individual is unable to convert tyrosine to phenylalanine |
2. | It is inherited as an X-linked recessive trait |
3. | Phenylalanine accumulates in the brain and is excreted in urine |
4. | It is an inborn error of metabolism |
Cyanide is a deadly poison as causes the electron transport system in mitochondria to stop because it forms a complex with:
1. NADH dehydrogenase
2. ATP synthase
3. Cytochrome a3
4. Succinate dehydrogenase
Identify the incorrect statement regarding angiosperm:
1. | A typical anther is bilobed and dithecous |
2. | Cells of tapetum are nourishing to developing pollen grains |
3. | In over 60% of angiosperms pollen grains are shed at the 3-celled stage |
4. | It is possible to store many pollen grains by cryopreservation |
For natural selection to bring about evolution, the trait selected by the nature must be:
1. | Dominant | 2. | Recessive |
3. | Mutant | 4. | Inherited |
Pollutants that carry the potential to cause maximum harm to the environment are:
1. Excess of natural nutrients
2. Non-biodegradable chemicals
3. Organic wastes from households
4. Biomass from dead animals and plants
The placental hormone that has functions similar to growth hormone and prolactin is:
1. Relaxin
2. Human chorionic gonadotropin
3. Inhibin
4. Human placental lactogen
Match each item in Column I with one item in Column II and select the correct option from the codes given:
COLUMN I |
|
COLUMN II |
|
A |
Mosaicism in plants |
P |
Prion |
B |
CJD in humans |
Q |
Sporozoan |
C |
Smut in wheat |
R |
Virus |
D |
Malaria in humans |
S |
Fungus |
Codes
|
A |
B |
C |
D |
1. |
P |
Q |
R |
S |
2. |
R |
P |
S |
Q |
3. |
Q |
R |
P |
S |
4. |
S |
P |
Q |
R |
The diagram shows the structure of an antibody molecule. Which number shows the antigen binding site?
1. | 1 | 2. | 3 |
3. | 4 | 4. | 5 |
Similar biological structures or sequences in different taxa are homologous if they:
1. | always perform the same function |
2. | result from convergent evolution |
3. | do not serve any known function |
4. | are derived from a common ancestor |
Which of the following diseases is/are correctly matched with their modes of transmission?
Disease/Infection |
Mode of transmission |
|
I. |
Ascariasis |
Contaminated food and water |
II. |
Elephantiasis |
Vector-borne |
III. |
Ringworm |
Direct contact |
Options:
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
Which of the following is a recessive trait in Pisum sativum?
1. Axial flower position
2. Yellow pod color
3. Violet flower color
4. Inflated pod shape
If we consider invertebrates, the maximum global biodiversity, after insects, is seen in:
1. | Crustaceans | 2. | Echinoderms |
3. | Mollusks | 4. | Annelids |
‘Competence’ for transformation can be induced in certain bacteria if they are treated with:
1. | Specific concentration of divalent cation like calcium |
2. | Polyethylene glycol |
3. | Cellulase to create protoplast |
4. | Colchicine |
Study the given diagram and select the correct statement:
1. | A – sperms are stored and get matured here |
2. | B – contribute an insignificant amount to seminal plasma |
3. | C – their secretions are acidic in nature |
4. | D – add fructose to the seminal plasma |
“Flavr Savr” is the name of the first genetically modified:
1. food approved for human use
2. salmon fish
3. herbicide-resistant plant
4. bacterium capable of remediation in oil spills
Identify the correct statement:
1. | Resistance to the yellow mosaic virus in mung bean and bhindi was introduced by mutations |
2. | Resistance to the yellow mosaic virus in mung bean and bhindi was transferred from wild varieties |
3. | Resistance to the yellow mosaic virus in mung bean was introduced by mutations and in bhindi was transferred from wild varieties |
4. | Resistance to the yellow mosaic virus in bhindi was introduced by mutations and in mung bean was transferred from wild varieties |
RFLP in DNA fingerprinting utilizes the polymorphism in:
1. | SNPs | 2. | VNTRs |
3. | LINES | 4. | SINES |
In E.coli, the enzyme that increases the permeability of the cell to β-galactosides is encoded by:
1. lac Y
2. lac A
3. lac Z
4. lac I
A fragment of nucleic acid (DNA or RNA) that can be used to identify, usually through autoradiography, specific DNA or RNA molecules bearing the complementary sequence is called:
1. | Vector | 2. | Probe |
3. | Selectable marker | 4. | Reporter gene |
Nucleic acid synthesis in a cell is blocked. The first affected molecular process will most likely be:
1. | mRNA synthesis | 2. | DNA replication |
3. | Translation | 4. | hnRNA splicing |
The association between the cattle egret and the grazing cattle is a classical example of:
1. | Mutualism | 2. | Competition |
3. | Parasitism | 4. | Commensalism |