Plant Biomolecules, Secondary Metabolites and Hormones - Plant Physiology and Biochemistry - Life Sciences Previous Year Questions

1

2007 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2007

Plant secondary metabolites

A

help to increase the growth rate of plant

B

help in plant reproduction processes

C

provide defense mechanisms against microbial attack

D

make the plant susceptible to unfavorable conditions

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2

2007 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2007

From the given statements identify the INCORRECT one.

A

GA involves in flowering

B

Ethylene is produced during ripening of the seeds

C

Auxin helps in cell elongation and formation cf root

D

Cytokinin helps in embryo development and prevent leaf senescence

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3

2008 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2008

Identify the correct statement

A

Cytokinin does not regulate cell division in plants

B

Kinetin was discovered as a breakdown product of DNA

C

Osmotic adjustment of cells does not help water balance in plants

D

Cytokinin enhances leaf senescence

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4

2010 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2010

Which one of the following is NOT a plant hormone?

A

Abscisic acid

B

Brassinosteroid

C

Ethylene

D

Cytokine

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5

2010 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2010

Match the following

Group I	Group II	Group III
P. Sorghum	1. Gossypol	i. Protein
Q. Castor	2. Strychnine	ii. Glycosidic conjugate
R. Mushroom	3. Dhurrin	iii. Alkaloid
S. Cotton	4. Bungarotoxin	iv. Polyphenol
	5. Ricin	v. Lipid
	6. α-Amanitin	vi. Cyclic peptide

A

P-3-ii, Q-5-i, R-6-vi, S-1-iv

B

P-2-ii, Q-4-iv, R-1-ii, S-6-v

C

P-2-vi, Q-5-v, R-1-iv, S-6-ii

D

P-2-i, Q-3-iii, R-4-iv, S-1-v

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6

2010 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2010

From the structures given below, identify the compounds

Group I (Structure)	Group II (Compound)
P	1. Ethylene
Q	2. Indole butyric acid
R	3. Nicotine
S	4. Indole acetic acid
	5. Gibberellic acid
	6. Menthol

A

P-6, Q-3, R-4, S-1

B

P-5, Q-2, R-3, S-1

C

P-4, Q-3, R-2, S-6

D

P-1, Q-2, R-5, S-6

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7

2011 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2011

Match the plants with their seed storage proteins

A

P-4, Q-3, R-5, S-2

B

P-2, Q-3, R-6, S-1

C

P-4, Q-2, R-1, S-3

D

P-3, Q-2, R-4, S-5

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8

2012 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2012

Cytoplasmic male sterility via the chloroplast genome can be induced by the expression of Pha A gene encoding

A

β-Ketothiolase

B

Acetoacetyl CoA carboxylase

C

Acetoacetyl CoA reductase

D

PHB synthase

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9

2012 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2012

Which of the following statements are TRUE for plant growth regulators?
P. The release of cellulase and polygalacturonase into the cell wall is promoted by abscissic acid
Q. The early biosynthetic steps of gibberellic acid, up to the formation of ent-kaurene take place in the plastid
R. The naturally occurring zeatin belongs to the aromatic group of cytokinins
S. Induction of protease inhibitors as a result of wounding and pathogen attack is activated by jasmonic acid

A

P, R

B

Q, S

C

Q, R

D

P, Q

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10

2012 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2012

Identify the CORRECT statements in plant secondary metabolism.
P. Tropane alkaloids in Atropa belladonna are synthesized from tyrosine
Q. Antioxidative food ingredient rosmarinic acid is obtained from cell suspension cultures of Coleus blumei
R. Thiophenes are produced from hairy root cultures of Tagetes patula
S. Cyanidin, the principal anthocyanin responsible for red color in Rosa hybrida is produced from cinnamaldehyde

A

P, S

B

R, S

C

P, Q

D

Q, R

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11

2013 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2013

Select the CORRECT set comprising only the synthetic analogues of auxin and cytokinin

A

IAA and Kinetin

B

2, 4-D and Zeatin

C

IAA and Zeatin

D

2, 4-D and Kinetin

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12

2014 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2014

The semi-dwarf trait of corn, wheat and rice plants used in breeding program during 1960s resulted in green revolution. Later this 'green-revolution gene' has been identified to be involved in either signal transduction pathway or biosynthesis of

A

Auxin

B

Gibberellin

C

Cytokinin

D

Ethylene

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13

2014 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2014

Select the CORRECT combination from the promoter (Column I), transcription machinery used (Column II) and target tissue type (Column III) to express a foreign gene in a plant system.

Column I	Column II	Column III
P. Ubiquitin	1. Chloroplast	i. Leaf
Q. Napin	2. Nucleus	ii. Seed
R. RbcL	3. Mitochondria
S. RbcS

A

P-1-i, Q-3-ii, R-2-i, S-3-ii

B

P-3-i, Q-1-i, R-2-ii, S-1-ii

C

P-2-i, Q-2-ii, R-1-i, S-2-i

D

P-1-ii, Q-3-i, R-2-ii, S-3-ii

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14

2015 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2015

Identify the CORRECT statements with regard to the function of plant hormones
P. ABA is synthesized from chorismate and promotes viviparous germination
Q. Auxin induces acidification of cell wall followed by turgour-induced cell expansion
R. Gibberellin-responsive genes become activated by the repression of DELLA protein
S. Cytokinin regulates the G₂ to M transition in the cell cycle

A

P, Q

B

Q, R

C

Q, S

D

P, R

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15

2016 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2016

PIN proteins are plasma membrane-localized carrier proteins required for polar auxin transport in plants. Four different carrier proteins are shown in the diagram below labeled P1-P4. Arrow indicates the direction of auxin flow. Which among these is most likely to be a PIN protein?

A

P 1

B

P 2

C

P 3

D

P 4

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16

2017 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2017

Which of the following plant hormones is a carotenoid-cleavage product?

A

Phytosulfokine

B

Brassinosteroid

C

Methyl jasmonate

D

Strigolactone

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17

2017 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2017

Identify the INCORRECT statement with relation to plant secondary metabolites.

A

Atropine is a member of indole alkaloids

B

Limonene is a cyclic terpene found in citrus plants

C

Green tea is rich in polyphenols

D

Cyanidin contributes to the red color in rose petals

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18

2018 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2018

Identify the CORRECT statement.

A

Receptor-like kinases play role in gametophytic self-incompatibility in Brassicaceae

B

Receptor-like kinases play role in sporophytic self-incompatibility in Solanaceae

C

Ribonucleases play role in sporophytic self-incompatibility in Brassicaceae

D

Ribonucleases play role in gametophytic self-incompatibility in Solanaceae

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19

2018 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2018

Identify the INCORRECT statement in connection with polar transport of auxin.

A

The putative influx carrier AUX1 is a cytosolic protein

B

Polar auxin transport in root tends to be both acropetal and basipetal in direction

C

Naphthylphthalamic acid (NPA) is an inhibitor of polar auxin transport

D

AUX1 and PIN1 proteins are located in the opposite ends of a cell for polar transport

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20

2018 · Life Sciences · Plant Physiology and Biochemistry · Plant Biomolecules, Secondary Metabolites and Hormones

Life Sciences (XL) 2018

Identify the CORRECT combination of statements with respect to chemical defense in plants.

A

P, Q

B

Q, S

C

R, S

D

P, S

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