Which of the following statements about biotechnology is correct? MCQ with Answer and Explanation

Which of the following statements about biotechnology is correct?
A. Bt cotton is resistant to all pesticides.
B. Restriction enzymes join DNA fragments.
C. Plasmids are used as vectors because they can replicate independently.
D. Tissue culture produces genetically diverse plants.
Answer: Option C
Solution (By JKSSB Mock Tests)
Plasmids have an origin of replication, making them effective cloning vectors. Restriction enzymes cut DNA, tissue culture produces clones, Bt cotton targets specific insects.

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The study of fungi is known as:
A. Phycology
B. Pteridology
C. Mycology
D. Bryology

Correct Answer: Option C


Explanation:
Mycology deals with fungi, including yeasts, molds, and mushrooms. Phycology is study of algae, bryology mosses, pteridology ferns.

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Question #2
The edible part of a pine seed is:
A. Perisperm
B. Endosperm
C. Cotyledons
D. Female gametophyte (haploid tissue)

Correct Answer: Option D


Explanation:
In gymnosperms like Pinus, the female gametophyte develops within the ovule and serves as the nutritive tissue for the developing embryo. Unlike angiosperms, where the nutritive tissue is the triploid endosperm formed after double fertilization, the gymnosperm nutritive tissue is haploid and forms before fertilization. Therefore, the edible part of a pine seed is the haploid female gametophyte.

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Which of the following is a function of the liver?
A. Production of thyroxine
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Correct Answer: Option B


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The liver produces bile, metabolizes nutrients, detoxifies, stores glycogen, and synthesizes plasma proteins. Insulin is from pancreas.

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