STD 12 - 10. biotechnology and its application — NEET STD 11 Science — Question

Select the correct statements
a. Seeds are formed inside embryo sac
b. The cotyledons of the embryo are simple structures, generally thick and swollen due to storage of food reserves
c. Ploidy of perisperm and nucellus are not same
d. Many fruits have evolved mechanisms for dispersal of seeds

Which of the following radioactive oxygen was used to detect the source of oxygen in photosynthesis

In monocot stem, which of the following is absent?

Turgidity of cell help in

Which of the following statements are correct for metabolism ?
(i) All chemical reactions occurring in living body together are called metabolism.
(ii) Majority of these metabolic reactions do not occur in isolation but are always linked to some other reactions.
(iii) Each of the metabolic reactions results in the transformation of biomolecules.
(iv) Metabolites are converted into each other in a series of linked reactions called metabolic pathways, these pathways are only linear.
(v) Metabolite flow is called the static state of body constituents.
(vi) Metabolic reactions is a catalysed reaction and there is no uncatalysed metabolic conversion in living systems.

The rate of growth is highest in

Assertion: Cyclic photophosphorylation is shown by both PS-I and PS-II
Reason: In cyclic phosphorylation the electron moves from PS-I to PS-II and PS-II to PS-I.