Free Cell The Unit Of Life (Weekly Quiz: 2) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Free Cell The Unit Of Life (Weekly Quiz: 2) Time:

Question-1

A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution?

(a)

(b)

(c)

(d)

Explanation:

Answer: (b)

Resolving power or limit of resolution is the ability of the eye to distinguish two close objects as separate. Its value is calculated by Abbe’s equation,

$L_{m} = {0.61 λ}/{NA}$

Where λ is the wavelength of light. NA or numerical aperture is multiple of refractive index and sine of angle subtended by optical axis and outer ray covered by objective (sina).


Question-2

Stroma in the chloroplasts of higher plant contains:

(a)

(b)

(c)

(d)

Explanation:

Answer: (d)

Stroma in the chloroplasts of higher plant contains light independent reactions enzymes. Within the stroma are stacks of thylakoids, the sub-organelles which are the site of photosynthesis.


Question-3

Gas vacuoles are found in

(a)

(b)

(c)

(d)


Question-4

Cell sap is a

(a)

(b)

(c)

(d)

Explanation:

Answer: (c)

Cell sap is a non-living fluid manufactured by the cytoplasm of the living plant cell. It consists of water and various substances that are often in the form of a colloidal suspension. The cell sap adds osmotic properties and turgor of the cell, according to the elasticity of plant tissues and organs. It also serves as a receptacle for the water and various substances that participate in cell metabolism and as a place for the deposit of the end products of metabolism.


Question-5

Membrane-bound organelles are absent in

(a)

(b)

(c)

(d)


Question-6

Which one of the following is not considered as part of the endomembrane system?

(a)

(b)

(c)

(d)

Explanation:

Answer: (a)

The endomembrane system includes endoplasmic reticulum, golgi complex, lysosomes and vacuoles.


Question-7

Assertion:
Cell wall help in cell to cell interaction.
Reason:
Cell wall provide barrier to undesirable macromolecules.

(a)

(b)

(c)

(d)


Question-8

Match the columns and identify the correct option.
Column IColumn II
(a) Thylakoids (i) Disc-shaped sacs in Golgi apparatus
(b) Cristae (ii) Condensed structure of DNA
(c) Cisternae (iii) Flat membranous sacs in stroma
(d) Chromatic (iv) Infoldings in mitochondria

(a)

(b)

(c)

(d)


Question-9

The prokaryotic flagella possess

(a)

(b)

(c)

(d)


Question-10

Which of the following is incorrect matching?

(a)

(b)

(c)

(d)


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