Question 1

AIDS is caused by the Human Immunodeficiency Virus (HIV). The transmission of HIV infection generally occurs through

Accepted Answer

AIDS is caused by the Human Immuno deficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome. Transmission of HIV-infection generally occurs by (a) sexual contact with infected person, (b) by transfusion of contaminated blood and blood products, (c) by sharing infected needles as in the case of intravenous drug abusers and (d) from infected mother to her child through placenta.

Question 2

Kwashiorkor disease in children is caused by

Accepted Answer

Kwashiorkar is produced by protein deficiency unaccompanied by calorie deficiency. It results from the replacement of mother’s milk by a high calorie-low protein diet in a child more than one year in age. Like marasmus, kwashiorkor shows wasting of muscles, thinning of limbs, failure of growth and brain development

Question 3

The mammalian heart is myogenic and it is regulated by nerves. The heartbeat originates from

Accepted Answer

The mammalian heartis called myogenic (myo = muscle, genie = originating from). It means the heart beat or the activities of the heart are auto regulated which originates from a muscle called nodal tissue.In the human heart,heartbeat originates and contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium; while the QRS waves are the depolarisation of the ventricles, which initiates the ventricular contraction.The T-wave represents the repolarisation,that is, the return of the ventricles from excited tonormal state.Hepatic portal system is the unique vascular connection that exists between the digestive tract and liver. This vein carries blood from intestine to the liver.

Question 4

Which one of the following with regard to Aridisol, one of the soil orders, is not correct?

Accepted Answer

All are correct except B as Aridisol is just like sand like soil as in Arid region e.g. In Rajasthan, so there will be very less amount of organic matter.

Question 5

What is full form of BOD?

Accepted Answer

Biological Oxygen Demand

Question 6

Alveoli is related to which of the following system of human body?

Accepted Answer

Respiratory system

Question 7

Night Blindness is caused by deficiency of which of the following Vitamin?

Accepted Answer

Vitamin A

Question 8

Which blood group is universal donor?

Accepted Answer

O–

Question 9

In which of the following class can we put Adrenaline?

Accepted Answer

Hormone

Question 10

In Animal Kingdom classification, which of the following is not a Phylum?

Accepted Answer

Coelomates

Question 11

__________ is the interaction in which one species benefits and the other is neither harmed nor benefited.

Accepted Answer

Commensalism

Question 12

Which organ does detoxification and produces chemicals needed for digestion?

Accepted Answer

Liver

Question 13

__________________ is a drug or substance that makes you feel relaxed and makes your body work and react more slowly.

Accepted Answer

Depressant

Question 14

Carica papaya is the scientific name of ___________.

Accepted Answer

Papaya

Question 15

Muscles get tired when there is shortfall of ___________.

Accepted Answer

ATP

Question 16

The female sex organs in a flower is the __________.

Accepted Answer

pistil

Question 17

The animals in which the body cavity is absent are known as __________.

Accepted Answer

Acoelomates

Question 18

Grevillea Robusta is the scientific name of _______.

Accepted Answer

Silver Oak

Question 19

Medulla oblongata is a part of which of the following?

Accepted Answer

Brain

Question 20

___________ is a typically onecelled, reproductive unit capable of giving rise to a new individual without sexual fusion.

Accepted Answer

Spore

Biology Questions