STD 12 - 11. organisms and populations — NEET STD 11 Science — Question

How many types of filament included in cytoskeleton structure?

In some plants like Cotton, Eucalyptus leaves change their shape. This helps to know the

Which of the following statements are correct for gibberellins ?
(i) Spraying juvenile conifers with GAs hastens the maturity period, thus leading to early seed production.
(ii) Promotes bolting in beet, cabbages and many plants with rosette habit.
(iii) It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
(iv) Their ability to cause an increase in length of axis is used to increase the length of grapes stalks.
(v) It help to initiate rooting in stem cuttings.
(vi) It promote flowering eg. in pineapples.

The giant red wood tree (Sequoia) is a/an

Plant growth in length is increased by

Select the correct statements for chemiosmosis hypothesis
a. Chemiosmosis requires a membrane, a proton pump, a proton gradient and ATP synthase
b. It is related with ATP formation
c. ATP synthase has a channel that allows diffusion of protons back across the membrane, this release enough energy to activate ATP synthase enzyme that catalyses the formation of ATP.
d. The breakdown of the gradient provides enough energy to cause a confirmational change in the CF1 particle of the ATP synthase, which makes the enzymes synthesise several molecules of energy packed ATP

The process of growth is determined by

In the initial stages of protoplast culture, sorbitol/mannitol is added

Micro-consumers are