Biology - Questions and Answers, General Study (GK)

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571.

Which one of the following forms an irreversible complex with haemoglobin of blood ?

(a)Pure nitrogen gas

(b)Carbon dioxide

(c)Carbon monoxide

(d)A mixture of carbon dioxide

Comment

Answer is: C

572.

Sugar syrup is used for the preservation of fruits because it :

(a)Drains moisture to inhibit growth of microorganisms

(b)Kills the microorganisms present in them

(c)Mixes well with the fruits

(d)Helps to improve their taste and flavour

Comment

Answer is: A

573.

Bionics is the science of :
1. application of mathematics to the study of living things
2. application of the knowledge of the living world characteristics to the world of machines
3. study of relation of an organism to its environment
4. study of laws of life

(a)2 only

(b)1 and 2

(d)1 and 4

Comment

Answer is: B

574.

The oxygen that keeps is a product of photosynthesis. It comes from ?

(a)Carbonates absorbed from soil

(b)Carbon dioxide

(c)Oxides of mineral elements

(d)Water

Comment

Answer is: D

575.

Milk tastes sour when kept in the open for some time due to the formation of

(a)Carbonic acid

(b)Lactic acid

(c)Malic acid

(d)Citric acid

Comment

Answer is: B

576.

Prokaryotes are

(a)Primitive plants without vascular systems

(b)Organisms lacking a definite nucleus

(c)Animals without well-developed nervous system

(d)Plants that do not produce flowers and fruits

Comment

Answer is: B

577.

Honey that has a high concentration of sugar does not decay because

(a)Bacteria cannot survive in an active state as it is totally deprived of oxygen

(b)It contains natural antioxidant that prevents bacteria attack

(c)Bacteria cannot survive in an active state in a solution of high osmotic strength as water is drawn out

(d)None of these

Comment

Answer is: C

578.

The chromosome number in a bacterium is

(a)1

(b)2

(d)3

Comment

Answer is: A

579.

A plant cell is distinguished from an animal cell by the presence of

(a)Chloroplasts

(b)Cell membrane

(c)Nucleus

(d)Cell wall

Comment

Answer is: D

580.

On chemical analysis, a bottle-cork is found to contain primarily

(a)Carbohydrates

(b)Tannins

(c)Lipids

(d)Proteins

Comment

Answer is: A

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Biology - Questions and AnswersPage 58

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