Botany Multiple Choice Questions

By: Prof. Dr. Fazal Rehman | Last updated: May 14, 2025

1. : There are ________ hydrogen bonds between thymine and adenine:
(A) 4
(B) 3
(C) 2
(D) 7

2. : The eyes on potato tubers are:
(A) Scars
(B) Sutures
(C) Rootlets
(D) Nodes with buds

3. : What is the stage of meiosis called in which pairing of homologous chromosomes starts?
(A) Diplotene
(B) Pachytene
(C) Leptotene
(D) Zygotene

4. : Fungus excluding mycelium is:
(A) Saccharomyces
(B) Mucor
(C) Puccinia
(D) Rhizopus

5. : A gene is located on the site of chromosome which is called a:
(A) Site
(B) Locus
(C) Allele
(D) Trait

6. : Photorespiration involves the organelles in it which are:
(A) Chloroplast, peroxisome, and glyoxysomes
(B) Glyoxysomes, chloroplast, and mitochondria
(C) Chloroplast, mitochondria and peroxisome
(D) Mitochondria, peroxisome and glyoxysomes

7. : The ratio of F2 generation in a dihybrid cross is:
(A) 1:2:1
(B) 1:1
(C) 9:3:3:1
(D) 3:1

8. : Floridean starch is found in __________:
(A) Phaeophyceae
(B) Rhodophyceae
(C) Chlorophyceae
(D) Myxophyceae

9. : What does the phenomenon called when a single gene has multiple effects?
(A) Pleiotropy
(B) Genostasis
(C) Codominance
(D) Epistasis

10. : What is the hormone reducing transpiration rate by inducing stomatal closure called:
(A) Cytokinin
(B) Auxin
(C) ABA
(D) Ethylene

11. : When was the Lamarck’s theory of evolution published?
(A) 1806
(B) 1802
(C) 1812
(D) 1809

12. : The female sex organ in bryophytes is known as:
(A) Antheridium
(B) Archegonium
(C) Ascogonium
(D) Carpogonium