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Assuming independent assortment, the percent of progeny with genotype AABb from a cross AaBb X AaBb is expected to be:

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:

Which of the following pairs is not correctly matched?

In a food chain, the transition from an earlier trophic level to the next trophic level will lead to:

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?

Identify the incorrect difference between a bryophyte and a pteridophyte:

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:

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:

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:

PGR causing the closure of stomata in response to water stress is:

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:

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:

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’?

Identify the incorrect statement regarding the ‘pericycle’:

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:

The chemical formula ${\mathrm{C}}_{20}{\mathrm{H}}_{32}{\mathrm{O}}_2$ 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:

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?

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:
 

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

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:

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:

Female heterogamety is seen in:

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 7^th / 8^th day post fertilization
3. blastocyst stage 7^th / 8^th 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?

Cirrhosis of liver is a complication of chronic abuse of:

Match each item in Column I [biocontrol agent] with one in Column II [pest controlled] and select the answer from the codes given:

Codes:

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:

The most relevant abiotic ecological factor for organisms is:

A biological process in which RNA molecules inhibit gene expression or translation, by neutralizing targeted mRNA molecules is known as:

The most common component of biogas is:

Identify the incorrectly matched pair:

The hormonal IUD, LNG-20, releases:

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:

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:

For natural selection to bring about evolution, the trait selected by the nature must be:

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:

Codes

The diagram shows the structure of an antibody molecule. Which number shows the antigen binding site?

Similar biological structures or sequences in different taxa are homologous if they:

Which of the following diseases is/are correctly matched with their modes of transmission?

Options:

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:

‘Competence’ for transformation can be induced in certain bacteria if they are treated with:

Study the given diagram and select the correct statement:
 

“Flavr Savr” is the name of the first genetically modified:

Identify the correct statement:

RFLP in DNA fingerprinting utilizes the polymorphism in:

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:

Nucleic acid synthesis in a cell is blocked. The first affected molecular process will most likely be:

The association between the cattle egret and the grazing cattle is a classical example of: