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Home
Questions & Answer
Science Questions & Answers
Biology Questions & Answers
Biology Questions & Answers
(Compiled from UPSC, SSC ,PSC ,IBPS previous question papers)
Most highly intelligent mammals are :
A
elephants
B
whales
C
dolphins
D
kangaroos
Which is responsible for the process of cell division ?
A
mitosis
B
heterosis
C
fusion
D
fission
Healing of wounds is hastened by vitamin ?
A
C
B
A
C
E
D
D
The deficiency of which of the following leads to dental caries ?
A
Iron
B
Fluorine
C
Copper
D
Zinc
Which one of the following is an enzyme ?
A
Somatotropin
B
Trypsin
C
Glucagon
D
Insulin
Which of the following is a skin disease ?
A
Rickets
B
Osteomalacia
C
Anaemia
D
Pellagra
The compound used in anti-malarial drug is
A
Chloroquin
B
Aspirin
C
Neoprene
D
Isoprene
Which of the following tests helps in diagnosis of cancer ?
A
Urine test
B
Neuro Test
C
Blood test
D
Biopsy test
The richest source of vitamin D is
A
Cheese
B
Milk
C
Spinach
D
Cod liver oil
What would happen if human blood becomes acidic ?
A
Oxygen-carrying capacity of haemoglobin is increase
B
Oxygen-carrying capacity of haemoglobin is decrease
C
Will remain same
D
Will be unpredictable
Human blood is a viscous fluid due to
A
Platelets in plasma
B
Proteins in blood
C
RBC and WBC in blood
D
Sodium in serum
Which of the following gases readily combines with the haemoglobin of the blood?
A
Carbon monoxide
B
Methene
C
Oxygen
D
Nitrogen dioxide
Plants absorb dissolved nitrates from soil and convert them into :
A
Free nitrogen
B
Urea
C
Proteins
D
Ammonia
Plants synthesis protein from
A
Starch
B
Sugar
C
Fatty acids
D
Amino acids
Photosynthesis generally takes place in which parts of the plant?
A
Steam and leaf
B
Leaf and other chloroplast bearing plants
C
Bark and leaf
D
Roots and chloroplast bearing plants
Bamboo is classified as
A
Bush
B
Tree
C
Grass
D
Weed
The disease caused by deficiency of protein in children is called
A
Pellagra
B
Marasmus
C
Beri-Beri
D
Rickets
What is movement of cell against concentration gradient is called
A
osmosis
B
active transport
C
diffusion
D
passive transport
Plants receive their nutrients mainly from ?
A
atmosphere
B
chlorophyll
C
light
D
soil
What is Pollination ?
A
germination of pollen grains
B
growth of pollen tube in ovule
C
transfer of pollen from anther to stigma
D
visiting flowers by insects
Which one of the following air pollution can affect blood stream leading to death ?
A
Cadmium
B
Asbestos dust
C
Carbon monodioxide
D
Lead
Which one of the following disease is not transmitted by tiger mosquitoes ?
A
Dengue
B
Chikungunya
C
Japanese Encephalitis
D
Yellow fever
Among the biotic components of the ecosystem, the producer system is ?
A
Sea
B
Rivers
C
Green Plants
D
Animals
Vitamin also acting as hormone:
A
Vitamin C
B
Vitamin B1
C
Vitamin A
D
Vitamin D
Two vitamins whose derivatives are involved in transformation of serine to glycine are:
A
B12 and nicotinamide
B
Folic acid and B6
C
Folic acid and B12
D
B6 ad B12
Which vitamin is synthesized by intestinal bacteria?
A
Vitamin K
B
Vitamin A
C
Vitamin D
D
Vitamin B
Which vitamin is related to a co-factor in glycine metabolism is:
A
Thiamine
B
Cobalamine
C
Vitamin E
D
Folic acid
Of prime importance in the structure of flavoproteins is:
A
Vitamin B6
B
Vitamin B2
C
Vitamin B1
D
Vitamin A
Tryptophan load test helps in the evaluation of deficiency of the vitamin:
A
Cyano cobolamine
B
Pyridoxine
C
Niacinamide
D
Folic acid
Biological activity of tocopherols has been attributed, in part to their action as:
A
Antidotes for selenium poisoning
B
Antioxidant
C
Anticoagulants
D
Provitamin
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