NEET Biology MCQs | NEET Cell The Unit of Life questions (MCQs) | Cell The Unit of Life Class 11 NEET questions | Online MCQs Test No 05
Cells: The basic unit of life - MCQ Quiz - 5
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Question 1 |
Which one of the following does not differ in E.coli and Chlamydomonas?
Cell wall | |
Cell membrane | |
Ribosomes | |
Chromosomal organization |
Question 2 |
Select the correct statement from the following regarding cell membrane
Lipids are arranged in a bilayer with polar heads towards the inner part. | |
Fluid mosaic model of cell membrane was proposed by Singer and Nicolson. | |
Na+ and K+ ions move across cell membrane by passive transport. | |
Proteins make up 60 to 70% of the cell membrane |
Question 3 |
What is true about ribosomes?
These are found only in eukaryotic cells | |
These are self-splicing introns of some RNAs. | |
The prokaryotic ribosomes are 80S, where "S" stands for sedimentation coefficient | |
These are composed of ribonucleic acid and proteins. |
Question 4 |
Ribosomal RNA is actively synthesized in :
Nucleoplasm | |
Ribosomes | |
Lysosomes | |
Nucleolus |
Question 5 |
E. Coli about to replicate was placed in a medium containing radio active thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation shall be correct?
Both the strands of DNA will be radio active | |
One strand radio active | |
Each strand half radio active | |
None is radio active |
Question 6 |
Assertion: A cell membrane shows fluid behaviour.
Reason: A membrane is a mosaic or composite of diverse lipids and proteins.
Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion. | |
Both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion. | |
Assertion is true statement but Reason is false. | |
Both Assertion and Reason are false statements. |
Question 7 |
A nucleosome is a portion of the chromonema containing ______.
both DNA and histones | |
only histones | |
both DNA and RNA | |
only DNA |
Question 8 |
If a cell has twice as much DNA as in a normal functional cell, it means that the cell ______.
has completed division | |
is preparing to divide | |
has ceased to function | |
has reached the end of its lifespan |
Question 9 |
What is the common point of similarity between DNA and RNA?
Both are double stranded | |
Both have identical sugar molecules | |
Both have identical pyrimidine bases | |
Both are polymers of nucleotides |
Question 10 |
Cell wall consists of
Lignin, hemi cellulose, pectin and lipid | |
Lignin, hemi cellulose, pectin and cellulose | |
Lignin hemi cellulose, protein and lipid | |
Hemi cellulose, cellulose, tubulin and lignin |
Question 11 |
Cytoskeleton is made up of
Proteinaceous filaments | |
Calcium carbonate granules | |
Callose deposits | |
Cellulosic microfibrils |
Question 12 |
Vacuole in a plant cell :
Lacks membrane and contains water and excretory substances | |
Is membrane-bound and contains storage proteins and lipids | |
Is membrane-bound and contains water and excretory substances | |
Lacks membrane and contains air |
Question 13 |
Polysome is formed by
Ribosomes attached to each other in a linear arrangement | |
Several ribosomes attached to a single mRNA | |
Many ribosomes attached to a strand of endoplasmic reticulum | |
A ribosome with several subunits |
Question 14 |
The rough endoplasmic reticulum (RER) in the cells are because of the presence of
Mitochondria associated with ER | |
Ribosomes on the surface of ER | |
Volutin granules on the surface of ER | |
Sulphur granules on the surface of ER |
Question 15 |
Assertion: Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed movements.
Reason: There are three principal types of protein filaments-actin filament, microtubules and intermediate filaments, which constitute the cytoskeleton.
Both assertion and reason are true and the reason is the correct explanation of the assertion. | |
Both assertion and reason are true but the reason is not the correct explanation of the assertion. | |
Assertion is true statement but reason is false. | |
Both assertion and reason are false. |
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