Match the following RNA polymerases with their transcribed products:
Column-I |
Column-II |
||
(a) |
RNA polymerase I |
(i) |
tRNA |
(b) |
RNA polymerase II |
(ii) |
rRNA |
(c) |
RNA polymerase III |
(iii) |
hnRNA |
Select the correct option from the following:
Options: | (a) | (b) | (c) |
1. | i | iii | ii |
2. | i | ii | iii |
3. | ii | iii | i |
4. | iii | ii | i |
In a marriage between a male with blood group A and a female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of the parents?
1. IA i (Male) ; IB IB (Female)
2. IA IA (Male) ; IB IB (Female)
3. IA IA (Male) ; IB i (Female)
4. IA i (Male) ; IB i(Female)
A population of a species invades a new area. Which of the following condition will lead to Adaptive Radiation?
1. | Area with a large number of habitats having very low food supply |
2. | Area with a single type of vacant habitat |
3. | Area with many types of vacant habitats |
4. | Area with many habitats occupied by a large number of species |
Identify A, B and C in the diagrammatic representation of the mechanism of hormone action.
Select the correct option from the following:
1. | A = Steroid Hormone; B = Hormone receptor Complex; C = Protein |
2. | A = Protein Hormone; B = Receptor; C = Cyclic AMP |
3. | A = Steroid Hormone; B = Receptor; C = Second Messenger |
4. | A = Protein Hormone; B = Cyclic AMP; C = Hormone-receptor Complex |
Humans have acquired an immune system that produces antibodies to neutralize pathogens. Still innate immune system is present at the time of birth because it:
1. | is very specific and uses different macrophages |
2. | produces memory cells for mounting a fast secondary response |
3. | has natural killer cells that can phagocytose and destroy microbes |
4. | provides passive immunity |
Which of the following statements is not correct?
1. | An action potential in an axon does not move backward because the segment behind is in a refractory phase. |
2. | Depolarization of hair cells of cochlea results in the opening of the mechanically gated Potassium- ion channels. |
3. | Rods are very sensitive and contribute to daylight vision. |
4. | In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction. |
Match the following joints with the bones involved:
Column-I | Column-II | ||
(a) | Gliding joint | (i) | Between carpal and metacarpal of thumb |
(b) | Hinge joint | (ii) | Between Atlas and Axis |
(c) | Pivot joint | (iii) | Between the Carpals |
(d) | Saddle joint | (iv) | Between Humerus and Ulna |
Select the correct option from the following:
(a) | (b) | (c) | (d) | |
1. | (iii) | (iv) | (ii) | (i) |
2. | (iv) | (i) | (ii) | (iii) |
3. | (iv) | (ii) | (iii) | (i) |
4. | (i) | (iii) | (ii) | (iv) |
Which of the following diseases is an auto-immune disorder?
1. Myasthenia gravis
2. Arthritis
3. Osteoporosis
4. Gout
Artificial light, extended work-time and reduced sleep-time disrupt the activity of:
1. Thymus gland
2. Pineal gland
3. Adrenal gland
4. Posterior pituitary gland
Which of the following conditions will stimulate parathyroid gland to release parathyroid hormone?
1. Fall in active Vitamin D levels
2. Fall in blood Ca+2 levels
3. Fall in bone Ca+2 levels
4. Rise in blood Ca+2 levels