Athletes often experience muscle cramps. Which of the following statements is true muscle cramps ?
(A) Muscle cramp is caused due to conversion of pyruvic acid into lactic acid in the cytoplasm
(B) Muscle cramp is caused due to conversion of pyruvic acid into lactic acid in the mitochondria
(C) Muscle cramp is caused due to nonconversion of glucose to pyruvate in the cytoplasm
(D) Muscle cramp is caused due to conversion of pyruvic acid into ethanol in the cytoplasm
A couple went to a doctor and reported that both of them are "carriers" for a particular disorder, their first
child is suffering from that disorder and that they are expecting their second child. What is the probability
that the new child would be affected by the same disorder ?
(A) 100 % (B) 50 % (C) 25 % (D) 75 %
Bacteriochlorophylls are photosynthetic pigments found in phototrophic bacteria. Their function is distinct
from the plant chlorophylls in that they-
(A) do not produce oxygen (B) do not conduct photosynthesis
(C) absorb only blue light (D) function without a light source
When a person is suffering from high fever, it is sometimes observed that the skin has a reddish tinge. Why
does this happen ?
(A) Red colour of the skin radiates more heat
(B) Fever causes the release of a red pigment in the skin
(C) There is more blood circulation to the skin to keep the body warm
(D) There is more blood circulation to the skin to release heat from the body
Fruit wrapped in paper ripens faster than when kept in open air because-
(A) Heat of respiration is retained better
(B) A chemical in the paper helps fruit ripening
(C) A volatile substance produced by the fruit is retained better and helps in ripening
(D) The fruit is cut off from the ambient oxygen which is an inhibitor to fruit repening
If you compare adults of two herbivore species of different sizes, but from the same geographical area, the
amount of faeces produced per kg body weight would be-
(A) More in the smaller one than the larger one
(B) More in the larger one than the smaller one
(C) Roughly the same amount in both
(D) Not possible to predict which would be more
Sometimes urea is fed to ruminants to improve their health. It works by-
(A) Helping growth of gut microbes that break down cellulose
(B) Killing harmful microorganisms in their gut
(C) Increasing salt content in the gut
(D) Directly stimulating blood cell proliferation
Path-finding by ants is by means of-
(A) Visually observing landmarks (B) Visually observing other ants
(C) Chemical signals between ants (D) Using the earth's magnetic field
If the total number of photons falling per unit area of a leaf per minute is kept constant, then which of the
following will result in maximum photosynthesis ?
(A) Shining green light (B) Shining sunlight
(C) Shining blue light (D) Shining ultraviolet light
A horse has 64 chromosomes and a donkey has 62. Mules result from crossing a horse and a donkey. State
which of the following is INCORRECT ?
(A) Mules can have either 64, 63 or 62 chromosomes
(B) Mules are infertile
(C) Mules have well defined gender (male/female)
(D) Mules have 63 chromosomes