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In the given diagram, which numbers depict Cystic duct [CD], Hepatic duct [HD], Common bile duct [CBD], Pancreatic duct [PD] and Sphincter of Oddi [SoD]?

The ability of one genotype to produce more than one phenotype when exposed to different environments is called as:
1. Developmental noise
2. Norm of the reaction
3. Phenotypic plasticity
4. Variable expressivity

It is not always easy to differentiate between a leaflet and a leaf but the following criteria may be helpful in differentiating between the two:
I. Buds are found in the axils of leaves but not in the axils of leaflets
II. Leaves extend from the stem in various planes but leaflets of a given leaf all lie in the same plane
III. Leaves always have a petiole while leaflets are always present on a common axis, rachis
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 responsible for determining blood type of a person?
1. antibodies present on the surface of erythrocytes
2. glycoproteins present in the plasma
3. antibodies present in the plasma
4. glycoproteins present on the surface of erythrocytes

A cryptogam is a plant that reproduces by spores, without flowers or seeds. Therefore, the term ‘Vascular Cryptogams’ is best applied to:

In Coconut, the drupe develops from:
1. monocarpellary, inferior ovary and is one seeded
2. multicarpellary, superior ovary and is multi seeded
3. monocarpellary, superior ovary and is one seeded
4. multicarpellary, inferior ovary and is multi seeded

Match the fungi [Column I] with the Class to which it belongs [Column II] and select the correct answer from the codes given:

Codes:

Reproduction is a characteristic but not an all-inclusive defining property of living organisms. Which of the following statements can be used to justify this fact regarding living organisms?
I. Some organisms are capable of reproducing by both sexual and asexual means.
II. The usage of the term ‘reproduction’ is not clear in the context of unicellular organisms.
III. Many organisms like mules do not reproduce at all.
IV. No non-living object is capable of reproducing or replicating by itself.
1. Only I and IV
2. Only II and III
3. Only I, II and III
4. Only II, III and IV

Which of the following will be defining property of mammals?
 

The opening of stomata is facilitated by:
1. uptake of H⁺ ions by guard cells
2. loss of K⁺ ions from the guard cells
3. radial orientation of cellulose microfibrils in the cell walls of the guard cells
4. loss of turgor in the guard cells

Study the given diagram and identify the correct statement.

1. If 1 is damaged, heart will stop
2. 2 ensures that atria contract prior to ventricles
3. 4 has the highest conduction velocity
4. 3 is the bundle of nerve fibers that carry impulses to the ventricles

The phrase ‘contagium vivium fluidum’, first used to describe a virus, is attributed to:
1. Louis Pasteur
2. D.J. Ivanowsky
3. M.W. Beijerinck
4. W.M. Stanley

The part of the fallopian tube where fertilization most commonly takes place is:
1. Infundibulum
2. Ampulla
3. Isthmus
4. Fundus

Consider the two statements:

The trait ‘resistance to certain antibiotics’ is seen in some bacteria due to the presence in them of:

In plants, the pressure component of water potential is most often negative in:

Consider the two statements: 

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.

Metabolic functions of insulin include:
I. Retards the uptake, use and utilization of glucose by body cells
II. Promotes the uptake of amino acids by body cells
III. Promotes the storage of fat and prevents lipolysis

For each molecule of ammonia produced during biological nitrogen fixation, the number of ATP molecules required is:
1. 4
2. 8
3. 12
4. 16

Identify the correctly matched pairs:

1. Only I and II
2. Only III and IV
3. Only I and III
4. Only II and IV

Unlike bryophytes and pteridophytes, in gymnosperms:

The primary electron acceptor of photosystem II in photosynthetic plants is:
1. Iron-sulfur protein
2. Plastoquinone
3. Plastocyanin
4. Pheophytin

The Calyx and Corolla show different types of aestivation in:

If done in an environment-friendly manner, the only solution for the treatment of e-wastes is:
1. Open-burning dumps
2. Incinerators
3. Recycling
4. Sanitary landfills

An abundance of smooth endoplasmic reticulum is expected in all the following human cells except:
1. Hepatocytes
2. Ovarian follicle cells
3. Sebaceous gland cells
4. Neurons

Two individual plants heterozygous at two unlinked loci are crossed. What proportion of progeny is expected to be homozygous recessive at least at one of the loci?

You expect to find disulfide bonds in:

An animal with the shown schematic body plan can be:

1. Adamsia 2. Euspongia 3. Fasciola 4. Ancylostoma

The correct sequence of layers [from the outside to the inside] of a mature woody stem will be:
1. Periderm – Vascular cambium – Phloem – Xylem
2. Periderm – Phloem – Vascular cambium – Xylem
3. Phellem – Phellogen – Phelloderm – Xylem – Phloem
4. Phellem – Phelloderm – Phellogen – Phloem – Xylem

Trypanosomabrucei, the pathogen responsible for causing African sleeping sickness in humans, is a:

Under normal physiological conditions, the glomerular ultrafiltrate should not contain:
1. Urea
2. Bicarbonate ions
3. Proteins
4. Glucose

In Periplaneta americana:

During which phase of the cell cycle does a mature human RBC replicate its DNA?
1. S phase
2. G₁ phase
3. G₂ phase
4. None

Which of the following is essentially a modified centriole?

Consider the two statements:

The functions of the central vacuole in a plant cell will include all except:

Consider the two statements:
I. ADH and RAAS work together in maintaining osmoregulatory homeostasis.
II. ADH and RAAS work antagonistically; ADH stimulates water reabsorption during dehydration and RAAS removal of water when it is in excess in body fluids.
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

HbA [Adult hemoglobin] has a quaternary structure with two α and two β polypeptide chains. What is true regarding the genes for these chains in an adult hemoglobin molecule?

DNA-dependent DNA polymerases do not:

In a human population, 1 in 10,000 are affected with an autosomal recessive disorder. What proportion of that human population is likely to be a carrier of the recessive allele?
1. approximately 0.02
2. approximately 0.19
3. approximately 0.98
4. approximately 0.2

The ion, critical in absorption of nutrients like amino acids and glucose in the human alimentary canal, is:
1. Na⁺
2. H⁺
3. K⁺
4. Ca⁺⁺

The figure shows a dividing cell at:

1. Anaphase I 2. Anaphase II 3. Telophase I 4. Telophase II

What would be true for the transition state of an enzyme catalyzed biological reaction?

Consider the two statements:
I. For breathing it is essential that human lungs are situated in an air tight thoracic chamber.
II. We cannot directly alter the pulmonary volume.
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

Consider the two statements:
I. Electrical synapses are rare in our system.
II. Electrical synapses conduct impulse faster than the chemical synapse.
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

Cell-mediated immunity in humans:

The neurotransmitter released by the motor neurons at the neuromuscular junction is:

The father and the mother of a child, with blood group O, have the blood groups A and B respectively. If these parents then have non-identical twins, what is the probability that both twins will have blood group B?

Classification of organisms based on measurable similarities and differences rather than genetic makeup and evolutionary descent is called phenetics. What type of biological classification system does it belong to?

An adventitious structure:
1. does not perform the normal functions of the organs
2. is detrimental to the health of the plant
3. arises in unexpected positions
4. are a sort of vestigial organs and reminiscent of evolutionary history

Organisms relying completely on external fertilization are almost always likely to be found in:
1. Tropical forests
2. Moist environments
3. Aquatic habitats
4. Dry, arid conditions

Malfunction of anterior pituitary is least likely to affect the secretion of:

Consider the two statements:

  
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.

For aerobic cellular respiration, identify the correctly matched row:

Notochord is present only in larval tail in all the following except:

Almost all pollens, that are allergens, are from:

Primary succession takes a very long time when compared to secondary succession, primarily, because:
1. immigration of pioneer species takes time
2. soil formation is a very slow process
3. there is a low availability of ecological niches
4. environmental conditions are highly variable

Identify the correct statement regarding the stage of embryogenesis in a eudicot shown in the given diagram:

A gene of interest is inserted into Lac z gene in a plasmid. The plasmid also carries the gene for ampicillin resistance. Recombinant transformants can be identified as:
1. A clone that did not grow on the ampicillin plates
2. A white colony on the ampicillin plates
3. A blue colony on the ampicillin plates
4. A red colony on the ampicillin plates

Flowering is inhibited in a plant by being exposed to bright lights at night. This plant should be categorized as a:
1. day-neutral plant
2. short-night plants
3. short-day plant
4. long-day plant

Inhibin is a hormone that:

Large holes in Swiss cheese are the result of fermentation by:
1. Streptococcus salivarius
2. Propionibacterium shermanii
3. Lactobacillus helveticus
4. Lactobacillus delbrueckii

Transmission through water and contaminated food is primarily responsible for the spread of all of the following infectious diseases except:

In a transcription unit, what defines the template and coding strands?

Biogas is primarily composed of:
1. Methane and Ammonia
2. Carbon dioxide and Hydrogen
3. Methane and Carbon dioxide
4. Hydrogen and Oxygen

A female has a regular 28 days menstrual cycle. The husband has oligospermia. The doctor wants to try IUI. What period of the menstrual cycle will be best for this procedure?

A dihybrid test cross between two linked loci results in the formation of four different phenotypes in the progeny with the number of each type being 88, 12, 8, and 92. What is the distance between the two loci on the chromosome they are placed upon?
1. 50 map units
2. 25 map unit
3. 20 map units
4. 10 map units

After water and proteins, which of the following components has maximum percentage of the total mass in a typical living cell?
1. Carbohydrates
2. Nucleic acids
3. Lipids
4. Ions

Speciation that occurs when biological populations of the same species become isolated from each other to an extent that prevents or interferes with gene flow is called as:

The World Summit on Sustainable Development was held in:

‘Slash and burn’ agriculture practice in India has resulted in deforestation. The basic problem with this agriculture method is that it requires:
1. use of a large amount of chemical fertilizers
2. continual application of pesticides
3. long time for the soil to recover
4. availability of hybrid seeds

Consider the two statements:

 
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.

In molecular biology, ‘rho [ρ] is a:

The sum of the environmental factors that tend to restrict the biotic potential of an organism is called environmental resistance. In the logistic growth equation dN/dt = rN[K-N/K], the environmental resistance is represented by:

When compared with the maternal contribution to the genetic constitution of the embryo, the maternal contribution to the endosperm in angiosperms is:

The steps included in a cycle of Polymerase Chain Reaction are:

Ozone can be destroyed by a number of free radical catalysts; the most important are:
I. OH^-
II. NO^-
III. Cl^-
IV. Br^-
Of these, human activity has drastically increased the levels of:
1. Only III
2. Only III and IV
3. Only I and II
4. I, II, III and IV

‘Atlas 66’ is an improved variety of:
1. rice rich in beta carotene
2. maize with increased tryptophan content
3. wheat having a high protein content
4. vitamin C enriched bitter gourd

The primary mechanism of action of copper IUDs is that they prevent:

Consider the two statements:

What event during meiosis is most likely to cause a change in the number of chromosomes like trisomies and monosomies in progeny?
1. an independent assortment of chromosomes
2. allele segregation
3. non-disjunction
4. recombination

RNA interference has been used to produce transgenic tobacco plant resistant to a nematode. It involves silencing gene expression at the:
1. initiation of transcription level
2. post-transcriptional but pre-translational level
3. level of translation
4. post-translational level

Immunodeficiency symptoms, particularly opportunistic infections in AIDS patients become prominent as the HIV starts selectively infecting and destroying:

The diagram shows the section of cochlea. Identify the correct statements:
 
I. E and G are filled with perilymph
II. C is the tectorial membrane
III. B is the otolith organ

Consider the two statements:

The mode of inheritance of the trait shown in the following pedigree is most likely:

Darwin finches are an excellent example of:
1. Adaptive radiation
2. Saltation
3. Genetic bottleneck
4. Founder effect

The first movements of the foetus and the appearance of hair on the head are usually observed during the:
1. the first month of pregnancy
2. the second month of pregnancy
3. the fifth month of pregnancy
4. the sixth month of pregnancy

Consider the two statements:

Which part of the brain is primarily responsible for hand-eye coordination in humans?
1. Occipital cortex
2. Parietal lobe of cerebrum
3. Cerebellum
4. Medulla oblongata