Plant Biotechnology MCQ Questions & Answers | Biotechnology Page-4 section-1

31.
What would he the effect of addition of 2, 4-D on the production of berberine by cell culture of Thalictrum minus?

A. To stimulate growth and thereby urease secondary metabolite production

B. Stimulate dedifferentiation and thereby decrease secondary metabolite production

C. Stimulate proliferation and reduce secondary metabolite production

D. None of the above

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32.
Multiplication of genetically identical copies of a cultivar by asexual reproduction is known as

A. Aclonal propagation

B. Vegetative propagation

C. Polyclonal propagation

D. Clonal propagation

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33.
Which one of the following is a second generation genetically engineered crop?

A. Bt brinjal

B. Roundup soyabean

C. Golden rice

D. Bt rice

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34.
Which of the following combinations of plant hormones and their associated function are correct?

Hormone Function

P. Abscisic acid 1. Breaks seed dormancy

Q. Auxin 2. Induces cell division

R. Ethylene 3. Stimulates ripening of fruits

S. Gibberellin 4. Promotes seed dormancy

A. P and R only

B. P and S only

C. Q and R only

D. Q and S only

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35.
Tobacco leaf discs are transferred with Agrobacterium tumefaciens strain containing binary vector (GUS as reporter gene) with selectable marker neo (kanamycin resistance gene) and then regenerated to plants. The plants are kanamycin resistant, but leaf tissues are negative to GUS assay. The explanation is

A. The plants are transformed for both genes but GUS gene is turned

B. The plants are transformed for only neo gene not the GUS gene

C. The plants are not transformed at all, but the development of kanamycin resistance is due to somaclonal variation

D. All the above

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36.
The plant hormone indole-3-acetic acid is derived from

A. Histidine

B. Tyrosine

C. Tryptophan

D. Proline

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37.
Match the following plant sources with their secondary metabolites and medical uses.

Source plant Secondary metabolites Medical use

P. Belladonna 1. Menthol a. Cancer treatment

Q. Foxglove 2. Atropine b. Heart disease

R. Pacific yew 3. Digitalin c. Eye examination

S. Eucalyptus 4. Taxol d. Cough

A. P-2-c, Q-3-b, R--4-a, S-1-d

B. P-3-c, Q-2-a, R-1-d, S-4-b

C. P-2-c, Q-4-b, R-1-a, S-3-d

D. P-1-b, Q-4-c, R-2-d, S-3-a

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38.
Hormone pairs required for a callus to differentiate are

A. Auxin and cytokinin

B. Auxin and gibberellin

C. Ethylene and gibberellin

D. Cytokinin and gibberellin

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39.
Resistance to herbicide chlorsulfuron in plants is due to change in

A. Glutamine synthetase

B. Acetolactate synthase

C. Theronine deaminase

D. DNA polymerase

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40.
The pungency of mustard seeds is primarily due to secondary metabolites such as isothiocyanate and nitrile. The pungency is usually felt only when the seeds are crushed. This is because of

A. The coat of the intact seeds blocks the pungent volatiles from being released

B. The pungent chemicals are stored as inactive conjugates and compartmentalized from the enzymes that convert them into active chemicals

C. The pungent chemicals are formed only after the reaction with atmospheric oxygen

D. The pungent chemicals are formed only after the reaction with atmospheric carbon dioxide

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Hormone	Function
P. Abscisic acid	1. Breaks seed dormancy
Q. Auxin	2. Induces cell division
R. Ethylene	3. Stimulates ripening of fruits
S. Gibberellin	4. Promotes seed dormancy

Source plant	Secondary metabolites	Medical use
P. Belladonna	1. Menthol	a. Cancer treatment
Q. Foxglove	2. Atropine	b. Heart disease
R. Pacific yew	3. Digitalin	c. Eye examination
S. Eucalyptus	4. Taxol	d. Cough

Plant Biotechnology MCQ Questions & Answers | Biotechnology

31. What would he the effect of addition of 2, 4-D on the production of berberine by cell culture of Thalictrum minus?

Answer & Solution

32. Multiplication of genetically identical copies of a cultivar by asexual reproduction is known as

Answer & Solution

33. Which one of the following is a second generation genetically engineered crop?

Answer & Solution

34. Which of the following combinations of plant hormones and their associated function are correct? Hormone Function P. Abscisic acid 1. Breaks seed dormancy Q. Auxin 2. Induces cell division R. Ethylene 3. Stimulates ripening of fruits S. Gibberellin 4. Promotes seed dormancy

Answer & Solution

Answer & Solution

36. The plant hormone indole-3-acetic acid is derived from

Answer & Solution

Answer & Solution

38. Hormone pairs required for a callus to differentiate are

Answer & Solution

39. Resistance to herbicide chlorsulfuron in plants is due to change in

Answer & Solution

40. The pungency of mustard seeds is primarily due to secondary metabolites such as isothiocyanate and nitrile. The pungency is usually felt only when the seeds are crushed. This is because of

Answer & Solution

31.
What would he the effect of addition of 2, 4-D on the production of berberine by cell culture of Thalictrum minus?

32.
Multiplication of genetically identical copies of a cultivar by asexual reproduction is known as

33.
Which one of the following is a second generation genetically engineered crop?

34.
Which of the following combinations of plant hormones and their associated function are correct?

Hormone Function

P. Abscisic acid 1. Breaks seed dormancy

Q. Auxin 2. Induces cell division

R. Ethylene 3. Stimulates ripening of fruits

S. Gibberellin 4. Promotes seed dormancy

36.
The plant hormone indole-3-acetic acid is derived from

38.
Hormone pairs required for a callus to differentiate are

39.
Resistance to herbicide chlorsulfuron in plants is due to change in

40.
The pungency of mustard seeds is primarily due to secondary metabolites such as isothiocyanate and nitrile. The pungency is usually felt only when the seeds are crushed. This is because of