Control and Coordination Test 32

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Control and Coordination Test 32

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Weekly Quiz Competition

Question 1
1 / -0

Nongenetic RNA is of

A
Two types

B
Three types

C
Four types

D
One type
Solution
There are 3 types of non genetic RNA's
mRNA = messenger RNA
tRNA = transfer RNA
rRNA = ribosomal RNA
Correct option B
Question 2
1 / -0

Embryo maturation is favoured by _____________.

A
IAA

B
$2, 4$ -D

C
BAP

D
ABA
Question 3
1 / -0

Choose the correct answer from the alternatives given.
Bakane disease of rice plants is due to the effect of:

A
auxins

B
gibberellins

C
ethylene

D
cytokinins
Question 4
1 / -0

In the context of rice diseases, match List-I with List-II using the codes given the lists.
List-I List-II
a. Helminthosporium oryzae $1$ . Gibberella fujikuroi
b. Rhizoctonia solani $2$ . Balanisa oryzae
c. Fusarium moniliforme $3$ . Cochliobolus miyabeanus
d. Ephelis oryzae $4$ . Corticium sasaki

A
A- $2$ , B- $3$ , C- $4$ , D- $1$

B
A- $4$ , B- $3$ , C- $1$ , D- $2$

C
A- $3$ , B- $44$ , C- $2$ , D- $1$

D
A- $3$ , B- $4$ , C- $1$ , D- $2$
Question 5
1 / -0

Select the correct statement regarding the Schwann cells.

A
Surround axon of myelinated nerve fibre

B
Support muscle fibres

C
Found in Haversian system of bones

D
Form basement membrane of epithelium.

Solution

A Schwann cell forms a myelin sheath by wrapping its plasma membrane concentrically around the axon of nerve cells.
Nerves having myelin sheath are called myelinated neurons.
So, the correct answer is option A.
Question 6
1 / -0

Reflex action is

A
Stimulus Sensory Motor Response

B
Stimulus Motor Sensory Response

C
Receptor Motor Sensory Response

D
Sensory Stimulus Motor Response

Solution

There are three main types of neuron: sensory, motor and relay. These different types of neurons work together in a reflex action . A reflex action is an automatic (involuntary) and rapid response to a stimulus, which minimises any damage to the body from potentially harmful conditions, such as touching something hot.
So, the correct answer is (A)
Question 7
1 / -0

Match the columns and choose the correct combination.

I II
(a) Cytokinin (p)
Stress hormone
(b) Auxins (q) Ripening of fruits
(c) Abscisic acid (r) Apical dominance
(d) Ethylene (s) Bolting
(t) Richmond-Lang Effect

A
a - t, b - r, c - p, d - q

B
a - t, b - r, c - p, d - s

C
a - r, b - s, c - q, d - p

D
a - q, b - s, c - t, d - r

Solution

Cytokinin is a plant hormone that produces the Richmond Lang effect. It inhibits ageing process of the plant. Auxin is a plant hormone that induces apical dominance. It promotes the growth of stem tip and inhibits the growth of lateral buds. Abscisic acid is a plant hormone. It is also called as stress hormone as under stress environmental condition, its concentration increases. It induces seed dormancy. Ethylene is a plant hormone. It is also called as ripening hormone as it induces ripening of fruits.
Thus, the correct answer is option A.
Question 8
1 / -0

Plant hormones play a role in regulating the development of plant seeds. The graphs below plot embryo growth and the changes in hormone concentration over time. Based on these results, which hormone most likely regulates embryo growth?

A
Auxin

B
Gibberellic acid

C
Abscisic acid

D
Both (A) and (B)
Question 9
1 / -0

Choose the correct answer from the alternatives given.
The mitotically active and hormone producing cells are:

A
xylem

B
meristem

C
phloem

D
cortex

Solution

Meristem is the actively dividing cells at the root and shoots apices that are mitotically active.
So, the correct option is 'meristem'.
Question 10
1 / -0

In plant tissue culture experiments, high auxin to cytokinin ratio favours .............. development and high cytokinin to auxin ratio favours .............. development.

A
Root, shoot

B
Shoot, root

C
Root, root

D
Shoot, shoot

Solution

Callus is an unorganized, undifferentiated mass of diving cells formed during tissue culture which requires both auxins and cytokinins for its growth and differentiation. In callus, shoot regeneration is promoted by a cytokinin, such as BAP (Benzylaminopurine) and root regeneration is promoted by an auxin, such as NAA (Naphthalene acetic acid). Thus, shoot and root regenerations in callus are controlled by auxin-cytokinin balance. Usually, an excess of auxins promote root regeneration and that of cytokinins promote shoot regeneration.
So the correct option is 'root, shoot'.

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Re-Attempt Weekly Quiz Competition

List-I	List-II
a. Helminthosporium oryzae	$1$ . Gibberella fujikuroi
b. Rhizoctonia solani	$2$ . Balanisa oryzae
c. Fusarium moniliforme	$3$ . Cochliobolus miyabeanus
d. Ephelis oryzae	$4$ . Corticium sasaki

	I		II
(a)	Cytokinin	(p)	Stress hormone
(b)	Auxins	(q)	Ripening of fruits
(c)	Abscisic acid	(r)	Apical dominance
(d)	Ethylene	(s)	Bolting
		(t)	Richmond-Lang Effect

Control and Coordination Test 32

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Control and Coordination Test 32

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SHARING IS CARING

Question 1

Two types

Three types

Four types

One type

Solution

Question 2

IAA

2,42, 42,4-D

BAP

ABA

Question 3

auxins

gibberellins

ethylene

cytokinins

Question 4

A-222, B-333, C-444, D-111

A-444, B-333, C-111, D-222

A-333, B-444444, C-222, D-111

A-333, B-444, C-111, D-222

Question 5

Surround axon of myelinated nerve fibre

Support muscle fibres

Found in Haversian system of bones

Form basement membrane of epithelium.

Solution

Question 6

Stimulus Sensory Motor Response

Stimulus Motor Sensory Response

Receptor Motor Sensory Response

Sensory Stimulus Motor Response

Solution

Question 7

a - t, b - r, c - p, d - q

a - t, b - r, c - p, d - s

a - r, b - s, c - q, d - p

a - q, b - s, c - t, d - r

Solution

Question 8

Auxin

Gibberellic acid

Abscisic acid

Both (A) and (B)

Question 9

xylem

meristem

phloem

cortex

Solution

Question 10

Root, shoot

Shoot, root

Root, root

Shoot, shoot

Solution

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$2, 4$ -D

A- $2$ , B- $3$ , C- $4$ , D- $1$

A- $4$ , B- $3$ , C- $1$ , D- $2$

A- $3$ , B- $44$ , C- $2$ , D- $1$

A- $3$ , B- $4$ , C- $1$ , D- $2$