Sigmoid Growth Curve

Q. ________ curve is obtained for cells in culture.

1. J-shaped
2. Linear
3. V-shaped
4. S-shaped

Q.

Growth plotted against time give a

1. Parabolic curve

2. Sigmoid curve

3. Upright line

4. Horizontal line

Q. Which of the following growth curves is a characteristic of most of the plants in their natural environment?

1. Arithmetic
2. Sigmoid
3. Linear
4. Parabolic

Q. Typical growth curve in plants is:

1. Parabolic
2. Sigmoid
3. Linear
4. Stair -steps shaped

Q.

In sigmoid growth curve, growth is slow in:

1. Log phase

2. Stationary phase

3. Exponential phase

4. Lag phase

Q.

Sigmoid curve showing the three distinct phases of growth follows the sequence of

1. Steady state, log phase and lag phase

2. Lag phase, log phase and steady phase

3. Log phase, lag phase and steady phase

4. Log phase, steady phase and lag phase

Q. Assertion :- A sigmoid curve is characteristic of plants growing in a natural environment.
Reason:- In natural conditions the supply of nutrients and food is ever increasing.

1. Both assertion and reason are true and reason is the correct explanation of assertion.
2. Both assertion and reason are true but reason is not the correct explanation of assertion.
3. The assertion is true but reason is false.
4. Both assertion and reason are false.