11. Hugo de Vries is related to which of the following theory of biology?
[A] aquatic ape theory
[B] modern anatomy
[C] Mutation Theory
[D] theory of evolution
Show Answer
Correct Answer: C [Mutation Theory]
Notes:
Hugo de Vries is a Dutch botanist and geneticist who pioneered the experimental study of biological evolution. His rediscovery of Gregor Mendel’s principles of heredity and his theory of biological mutation in 1900.
12. Microfilaments are made up of which protein?
[A] Tubulin
[B] Actin
[C] Myosin
[D] Chitin
Show Answer
Correct Answer: B [Actin]
Notes:
Microfilaments are composed of globular subunits of the protein actin. Actin monomers polymerize in the presence of ATP to form flexible helical filaments.
13. Which virus belongs to the family Caliciviridae?
[A] Hepatitis B virus
[B] Hepatitis D virus
[C] Hepatitis E virus
[D] All of these
Show Answer
Correct Answer: C [Hepatitis E virus]
Notes:
The Caliciviridae family contains five genera are Norovirus, Sapovirus, Lagovirus, Vesivirus, and Nebovirus.
14. Viruses reproduce in living cells by__?
[A] replication
[B] duplication
[C] multiplication
[D] all of these
Show Answer
Correct Answer: A [replication]
Notes:
DNA replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules.
15. Conifers can tolerate extreme environments because of__?
[A] Presence of vessels
[B] Thick cuticle
[C] Superficial stomata
[D] Broad hardy leaves
Show Answer
Correct Answer: B [Thick cuticle]
Notes:
Conifers (gymnosperms) are adapted to tolerate extreme environmental conditions due to their dense cuticle, sunken stomata and needle-like leaves.
16. Which of the following is not a cause of Food Poisoning?
[A] Salmonella
[B] Campylobacter
[C] E. coli & Shigella
[D] Yersinia pestis
Show Answer
Correct Answer: D [Yersinia pestis]
Notes:
Plague is a disease that affects humans and other mammals and is caused by the bacterium Yersinia pestis.
17. Algae cell wall is made up of which of the following?
[A] Chitin
[B] Cutin
[C] Cellulose
[D] Suberin
Show Answer
Correct Answer: C [Cellulose]
Notes:
The Algae cell wall is made up of Cellulose.
18. Intercalary Meristem is found in which of the following?
[A] grass
[B] monocots
[C] pines
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Intercalary Meristem is found in grass, monocots, and pines. It is a part of the apical meristem and it increases the height of the plant.
19. Where is the phloem located?
[A] outer side of the vascular bundle.
[B] centre of the vascular bundle
[C] marginal regions of leaves and stems
[D] None of these
Show Answer
Correct Answer: A [outer side of the vascular bundle.]
Notes:
The xylem is located towards the adaxial surface of the leaf, whereas the phloem is located towards the axial surface of the leaf.
20. Which of the following stimulates by gibberellin hormone?
[A] shoot elongation
[B] seed germination
[C] fruit and flower maturation
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Gibberellins hormones stimulate shoot elongation, seed germination, and fruit and flower maturation.
