11. Which of the following can be done in the cultivation of plant viruses?
[A] tissue culture
[B] cultures of separated cells
[C] whole plants
[D] all of these
Show Answer
Correct Answer: D [all of these]
Notes:
The cultivation of plant viruses can be done in tissue culture, cultures of separated cells and whole plants.
12. 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.
13. Whooping cough is caused by which of the following?
[A] Bordetella pertussis
[B] Helicobacter pylori
[C] Yersinia pestis
[D] Treponema pallidum
Show Answer
Correct Answer: A [Bordetella pertussis]
Notes:
Pertussis is a respiratory disease commonly known as whooping cough. It is a very contagious disease caused by a type of bacteria called Bordetella pertussis.
14. Fungi that get their food directly from dead organic matter are called?
[A] Predators
[B] Decomposers
[C] Mutualists
[D] Parasitic fungi
Show Answer
Correct Answer: B [Decomposers]
Notes:
Fungi that get their food directly from dead organic matter are called Decomposers.
15. Bryophytes are dependent on water because__?
[A] Archegonium has to remain filled with water for fertilization
[B] Water is essential for fertilization for their homosporous nature
[C] Water is essential for their vegetative propagation
[D] The sperms can easily reach up to egg in the archegonium
Show Answer
Correct Answer: D [The sperms can easily reach up to egg in the archegonium]
Notes:
Bryophytes are dependent on water because the sperms can easily reach up to eggs in the archegonium.
16. A bryophyte that has nitrogen-fixing blue-green algae in its thallus is__?
[A] Pogonatum
[B] Riccia
[C] Marchantia
[D] Anthoceros
Show Answer
Correct Answer: D [Anthoceros]
Notes:
A bryophyte that has nitrogen-fixing blue-green algae in its thallus is Anthoceros. Species of Anthoceros have a small to medium-sized green thallus.
17. In which group would you place a plant that produces spores, lacks seeds, and has vascular tissue?
[A] Bryophyte
[B] Algae
[C] Pteridophyte
[D] Gymnosperm
Show Answer
Correct Answer: C [Pteridophyte]
Notes:
Pteridophyte is a vascular plant that disperses spores as pteridophytes produce neither flowers nor seeds.
18. How many stamens are present in the family Liliaceae?
[A] 6
[B] 9
[C] 5
[D] 7
Show Answer
Correct Answer: A [6]
Notes:
Liliaceae usually have 6 stamens. A style is sometimes divided into three branches. The fruit may be a dry capsule with a membranous or leathery exterior or a fleshy berry.
19. Which tissue contains various glands, which secrete oils, resins, tannins, mucilage, etc. to the plant?
[A] Laticiferous
[B] Euphorbiaceae
[C] Glandular
[D] All of the above
Show Answer
Correct Answer: C [Glandular]
Notes:
Glandular tissue contains various glands, which secrete oils, resins, tannins, mucilage, etc. to the plant.
20. Alpha-ketoglutarate dehydrogenase results in__?
[A] Oxidation and Decarboxylation
[B] Shortage
[C] oxidation
[D] none of these
Show Answer
Correct Answer: A [Oxidation and Decarboxylation]
Notes:
Alpha-ketoglutarate dehydrogenase is a highly regulated enzyme, which may determine metabolic flux through the Krebs cycle.
