set 1 MCQ Questions & Answers Detailed Explanation

Question : 1

Pollination takes place in

a) Pteridophyta

b) Gymnosperms

c) Both (a) & (b)

d) None of these

Question : 2

Chromosomes contain hereditary units called

a) RNA

b) ribosomes

c) genes

d) DNA

Question : 3

In cell cycle, DNA replication takes place in

a) G2 phase

b) G1 phase

c) Mitotic metaphase

d) S phase

Question : 4

Lymphocytes cells are formed in which part of human body?

a) Long bone

b) Pancreas

c) Liver

d) Spleen

Question : 5

70S type of ribosomes is found in

a) Prokaryotic cells, chloroplasts and mitochondria

b) Prokaryotic cells

c) Mitochondria

d) Nucleus, mitochondria

Question : 6

The exchange of genetic material between chromatids of paired homologous chromosomes during first meiotic division is called

a) synapsis

b) chiasmata

c) transformation

d) crossing over