Biology Final Exam

You are about to begin your final exam:

This exam comprises 50 multiple choice questions.
You must select the best answer among 5 choices.
You will have 30 seconds to answer each question.
You will be awarded 5 points for each correct answer.
You will lose 2 points for each incorrect answer.
You need 150 points to pass this exam.

Press the "next" button to proceed. Good luck.

You are about to begin your final exam:

This exam comprises 50 multiple choice questions.
You must select the best answer among 5 choices.
You will have 30 seconds to answer each question.
You will be awarded 5 points for each correct answer.
You will lose 2 points for each incorrect answer.
You need 150 points to pass this exam.

Press the "next" button to proceed. Good luck.

During photosynthesis:

Light reactions produce sugar, while the Calvin cycle produces O2

Light reactions produce NADPH and ATP, while the Calvin cycle produces sugar

Light reactions photophosphorylate ADP, while the Calvin cycle produces ATP

Light reactions photophosphorylate ATP, while the Calvin cycle produces ADP

The Calvin cycle produces both sugar and O2

During oogenesis the cell that is fertilized by a sperm to become an egg is:

One strand of DNA has the following sequence of nucleotide 3’ ATTCGCTAT 5’ so the other strand of DNA has:

If a patient is advised to take more meat, butter milk and eggs in his diet. The person is:

Damage to thymus in children may lead to:

Chemical signals released by an organism that influence the behavior of other individuals of the same species are called:

A doctor suggested to a couple not to have more than one child because of:

An insect bite may result in inflammation of that spot. It is triggered by alarm chemicals such as:

Secretory cells that release relatively large quantities of glycoproteins contain relatively large amounts of which of the following?

Carrier ions like Na+ facilitate the absorption of substances like:

If for some reason our goblet cells are non-functional this will adversely affect:

Production of somatostatin

Smooth movement of food down the intestine

Secretion of sebum from the sebaceous glands

Maturation of sperms

Absorption of key nutrients

What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin

In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin

Gastric juice will be deficient in pepsinogen

Gastric juice will be deficient in chymosin

Absorption of nutrients will be impaired

A young infant may be feeding entirely on mother's milk which is white in colour but the stool which the infant passes out is quite yellowish. What is this yellow colour due to?

Aggregates of lymphoid tissue present in the distal portion of the small intestine are known as:

An action potential in the nerve fibre is produced when positive and negative charges on outside and the inside of the axon membrane are reversed because:

Most potassium ions leave the axon

More sodium ions enter the axon as compared to potassium ions leaving it

More potassium ions enter the axon as compared to sodium ions leaving it

Influx of sodium ions entering the axon

The influx rates of sodium and potassium within the cell differ initially

Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?

Vacuoles and fibres

Perikaryon and dendrites

Flagellum and medullary sheath

Nucleus and mitochondria

Nerve cells and other cell types do not differ in structure

Unidirectional transmission of a nerve impulse through nerve fibre is due to the fact that:

Nerve fibre is insulated by a medullary sheath

Neurotransmitters are released by the axon endings and not by dendrites

Sodium pump starts operating only at the cyton and then continues into the nerve fibre

Neurotransmitters are released by dendrites and not by axon endings

Nsodium pump starts operating only at the dentrite and then continues into the nerve fibre ucture

If vagus nerve in man is damaged, which of the following will not be affected?

Cornea transplant in humans is almost never rejected. This is because:

Typical ‘lubb-dup’ sounds heard in heart beat are due to:

Closing of bicuspid and tricuspid valves

Closure of bicuspid-tricuspid valves followed by semilunar valves

Closing of semilunar valves

Blood under pressure through aorta

Opening of bicuspid-tricuspid valves followed by closure of semilunar valves

Which is correct about leucocytes:

They are red coloured

They can cross capillaries

They are enucleate

Decrease in their number causes Leukemia

Increase in their number indicates viral infection

The maximum volume of air that can be released from the lungs by forceful expiration after deepest inspiration is called the:

Which one of the following statement is NOT correct regarding trachea?

It splits into the right and left bronchi to supply air to the lungs

It usually lies posterior to the muscular esophagus

Opening to the trachea is covered by epiglottis

Tracheal rings are C-shaped

It is cartiliginous

Which one of the following statements is NOT correct?

The nasal cavity warms and humidifies the air before it enters the lungs

The visceral pleura is in direct contact with the chest wall

The right lung is composed of three lobes, but the left lung has only two lobes

Lung volumes and vital capacity measure lung function

All statements are true

Which one of the following is wrong statement?

Nitrosomonas and Nitrobacter are chemoautotrophs

Phosphorus is a constituent of cell membranes, certain nucleic acids and all proteins

Anabaena and Nostoc are capable of fixing nitrogen in free-living state also

Root nodule forming nitrogen fixers live as aerobes under free-living conditions

All statements are true

The catalytic efficiency of two different enzymes can be compared by the:

Which one of the following amino-acids was not found to be synthesized in Miller's experiment?

Which of the following statements regarding enzyme inhibition is correct?

Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein

Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme

Non-competitive inhibitors often bind to the enzyme irreversibly

Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate

Non-competitive inhibition of an enzyme can be overcome by negative feedback

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these:

Are exclusively synthesized in the body of a living organism as at present

Help in regulating metabolism

Enhance oxidative metabolism

Are conjugated proteins

Are conjugated glycoproteins

Carbohydrates, the most abundant biomolecules on earth, are produced by:

Fungi, algae and green plants cells

Some bacteria, algae and green plant cells

All bacteria, fungi and algae

Some viruses, fungi and bacteria

Some fungi, algae and green plants cells

Given below are two statements A and B. Choose the correct answer related to the statements.

Statement A - Amino acids are amphoteric in their function.

Statement B - All amino acids are necessary for our body.

Statement A is wrong, statement B is correct

Both the statements A and B are correct

Statement A is may be correct in certain circumstances, statement B is correct

Both the statements A and B are wrong

Statement A is correct, statement B is wrong

In which one of the following sets of three items each belong to the category mentioned against them?

Lysine, glycine, thiamine — Amino acids

Rennin, helicase and hyaluronidase — Enzymes

Myosin, oxytocin and gastric — Hormones

Optic nerve, oculomotor, vagus — Sensory nerves

Insulin, Glucagon, GLP-1 - Pancreatic hormones

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