Senescence

Q. Which among the following can be considered as a sign of a senescent phase in humans?
i) Slowing of metabolism
ii) End of reproductive phase
iii) No increase in height

1. Only ii
2. Both ii and iii
3. Both i and ii
4. Both i and iii

Q.

The correct sequence of different phases of an organism is

1. Vegetative phase - Senescence phase - Reproductive phase

2. Juvenile phase - Reproductive phase - Maturity phase

3. Juvenile phase - Maturity Phase - Old age

4. Vegetative phase - Old age - Senescence phase

Q.

What is the cause of senescence in cells such as human cells?

Q. Maximum growth occurs during

1. stationary phase
2. lag phase
3. exponential phase
4. senescent phase

Q. some dividing cells exit the cell cycle and enter vegetative inactive .this is called as quiescent stage (g0)this process occure at the end of A>G2 phase B>M phase C>G1phase D>S phase (neet 2020)

Q. Which among the following can be considered as a sign of a senescent phase in humans?
i) Slowing of metabolism
ii) End of reproductive phase
iii) No increase in height

1. Only ii
2. Both ii and iii
3. Both i and ii
4. Both i and iii

Q.

Which one of the following is mismatched?

1. Senescence phase - phase of transition

2. Juvenile phase - phase of rapid growth

3. Maturity phase - phase of reproductive activity

4. Old age - phase of declined metabolism

Q. Senescent phase of an organism's life span can be recognised by

1. Slow metabolism
2. Decreased immunity
3. Cessation of reproduction
4. All of the above
   

Q. Which is the true statement from the following?
(a) Ageing leads to an important physiological function, called as senescence.
(b) Growth usually involves cell proliferation.
(c) Learning declines more quickly in men than in women with advancing age.
(d) Science of ageing called as thanatology.

1. a, b and c are correct
2. b and d are correct
3. a and b are correct
4. a and c are correct

Q.

Which one of the following is mismatched?

1. Juvenile phase - phase of rapid growth

2. Maturity phase - phase of reproductive activity

3. Old age - phase of declined metabolism

4. Senescence phase - phase of transition

Q.

The correct sequence of different phases of an organism is

1. Vegetative phase - Senescence phase - Reproductive phase

2. Juvenile phase - Reproductive phase - Maturity phase

3. Juvenile phase - Maturity Phase - Old age

4. Vegetative phase - Old age - Senescence phase

Q.

The period of growth and maturity in organisms before they can reproduce sexually is known as

1. senescence phase

2. metaphase

3. juvenile phase

4. prophase

Q. Aging is a process programmed by the action of on-off-switches, was postulated by

1. Orgel
2. Holliday
3. B. L. Strehler
4. Clinker