NEET Test 169

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NEET Test 169

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Weekly Quiz Competition

Question 1
4 / -1

The refracting angle of the prism is 4.5^∘ and its refractive index is 1.52. The angle of minimum deviation will be :

A
2^∘

B
2.3^∘

C
4.5^∘

D
1.5^∘

Solution
Question 2
4 / -1

At t = 0, an arrow is fired vertically upwards with a speed of 100ms⁻¹. A second arrow is fired vertically upwards with the same speed at t = 5 s. Then,

A
The two arrows will be at the same height above the ground at t = 20 s

B
The two arrows will reach back to their starting points at t = 20 s and t = 25 s

C
The ratio of the speed of the first arrow and that of the second arrow at t = 20 s will be 2 : 1

D
The maximum height attained by either arrow will be 980 m

Solution
Question 3
4 / -1

Sucrose is translocated through phloem can be demonstrated by ________

A
girdling the stem

B
defoliation

C
grafting

D
root pressure

Solution

Defoliation is the detachment of leaves from the branch. Grafting is a method of vegetative propagation. Root pressure is responsible for upward movement of water and minerals in xylem. Ringing of stem in girdling experiment is the method of explain the translocation of sucrose is carried out through phloem.

Translocation of organic substances is the movement of organic nutrients from the region of the source to sink. Phloem (sieve tubes or sieve cells) is the pathway for this translocation, as proved by stem girdling, sieve tube puncture, radio autographs and sieve tube analysis experiment.
Question 4
4 / -1

A giant telescope in an observatory has an objective of focal length 19 m and an eye-piece of focal length 1.0cm. In normal adjustment, the telescope is used to view the moon. What is the diameter of the image of the moon formed by the objective? The diameter of the moon is 3.5 × 10⁶m and the radius of the lunar orbit around Earth is 3.8 × 10⁸m.

A
10 cm

B
12.5 cm

C
15 cm

D
17.5 cm

Solution

Question 5

4 / -1

Select the correct match of the types of neuron given in column-I with its location given in column-II.

	Column I		Column II
(A)	Sclera	(I)	The visible coloured portion of the eye
(B)	Choroid	(II)	Its diameter is regulated by the muscle fibres of iris
(C)	Pupil	(III)	Composed of a dense connective tissue
(D)	Fovea	(IV)	Portion of the retina where only the cones are densely packed
(E)	Iris	(V)	Contains many blood vessels and looks bluish in colour

A-I; B-II; C-III; D-IV; E-V

A-III; B-V; C-II; D-IV; E-I

A-IV; B-I; C-V; D-II; E-III

A-III; B-I; C-V; D-II; E-IV

Solution

Sclera is the external layer composed of dense connective tissue. It is the tough, opaque tissue that serves as protective outer coat for eye. Choroid contains many blood vessels and looks bluish in colour. Pupil is a hole located in the centre of the iris of the eye that allows light to strike the retina. It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye that mostly miss exiting the narrow pupil. Fovea is a portion of retina where only the cones are densely packed. Iris is the visible coloured portion of the eye.

Question 6
4 / -1

Two ideal junction diodes D₁ and D₂are connected to a battery as shown in the figure. What is the current supplied by the battery if its terminals are interchanged?

A
0.25 A

B
0.5 A

C
0.75 A

D
zero

Solution

When the terminals are reserved D₁ is then reverse biased which will fetch no current, so the resistance 10 ohm is out from the scene now, the current is equal to the resistance and since D₂ is forward biased 20 ohm resistance will only be counted therefore current is equal to
Question 7
4 / -1

The difference between lectin and lecithin is:

A
A Lectin is a secondary metabolite while lecithin is a phospholipid.

B
Lectin is a fat-binding protein while lecithin is a phospholipid.

C
Lectin is a phospholipid with choline while lecithin is a carbohydrate-binding protein.

D
Lectin is a phospholipid while lecithin is a secondary metabolite.

Solution

The main differentiating factor between lectin and lecithin is that lectin is a secondary metabolite. Concanavalin A is a plant protein which binds with carbohydrate whereas lecithin is a fatty substance which is found in plant and animal tissues. Lectin. due to its ability to bind with carbohydrates reduces nutrient absorption. Lecithin itself is an essential fatty nutrient, a major component of phosphatidylcholine with the ability to lower the bad cholesterol in the body.
Question 8
4 / -1

Which of the following statements is correct?

a. rRNA is the most abundant RNA.

b. Ribosomes are composed of approximately 80% rRNA and 20% ribosomal proteins.

c. rRNA is a type of coding RNA.

A
Statements 'a', 'b' and 'c' are correct

B
Statement 'a' is correct

C
Statements 'a' and 'c' are correct

D
Statements 'b' and 'c' are correct

Solution

rRNA is most abundant in the cell. It constitutes 80% of the total RNA of the cell. Ribosomes are composed of approximately 60% rRNA and 40% ribosomal proteins. rRNA is a type of non-coding RNA.
Question 9
4 / -1

During the electrolysis of molten sodium chloride, the time required to produce 0.10 mol of chlorine gas using a current of 3 amperes is

A
55 minutes

B
110 minutes

C
220 minutes

D
330 minutes

Solution
Question 10
4 / -1

Which energy state of triply ionized beryllium (Be⁺⁺⁺) has the same electron orbital radius as that of the ground state of hydrogen? Given Z for beryllium = 4

A
n = 1

B
n = 2

C
n = 3

D
n = 4

Solution

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Re-Attempt Weekly Quiz Competition

NEET Test 169

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NEET Test 169

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SHARING IS CARING

Question 1

2∘

2.3∘

4.5∘

1.5∘

Solution

Question 2

The two arrows will be at the same height above the ground at t = 20 s

The two arrows will reach back to their starting points at t = 20 s and t = 25 s

The ratio of the speed of the first arrow and that of the second arrow at t = 20 s will be 2 : 1

The maximum height attained by either arrow will be 980 m

Solution

Question 3

girdling the stem

defoliation

grafting

root pressure

Solution

Question 4

10 cm

12.5 cm

15 cm

17.5 cm

Solution

Question 5

A-I; B-II; C-III; D-IV; E-V

A-III; B-V; C-II; D-IV; E-I

A-IV; B-I; C-V; D-II; E-III

A-III; B-I; C-V; D-II; E-IV

Solution

Question 6

0.25 A

0.5 A

0.75 A

zero

Solution

Question 7

A Lectin is a secondary metabolite while lecithin is a phospholipid.

Lectin is a fat-binding protein while lecithin is a phospholipid.

Lectin is a phospholipid with choline while lecithin is a carbohydrate-binding protein.

Lectin is a phospholipid while lecithin is a secondary metabolite.

Solution

Question 8

Statements 'a', 'b' and 'c' are correct

Statement 'a' is correct

Statements 'a' and 'c' are correct

Statements 'b' and 'c' are correct

Solution

Question 9

55 minutes

110 minutes

220 minutes

330 minutes

Solution

Question 10

n = 1

n = 2

n = 3

n = 4

Solution

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2^∘

2.3^∘

4.5^∘

1.5^∘