Biology - Comprehensive Mock Test 59

Question 581 Easy

Cytoskeleton is made up of ?

A) Proteinaceous filaments B) Calcium carbonate granules C) Callose deposits D) Cellulosic microfibrils

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Question 582 Easy

Cell wall consists of?

A) Lignin, hemi cellulose, pectin and lipid B) Lignin, hemi cellulose, pectin and cellulose C) Lignin hemi cellulose, protein and lipid D) Hemi cellulose, cellulose, tubulin and lignin

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Question 583 Medium

What is the common point of similarity between DNA and RNA?

A) Both are double stranded B) Both have identical sugar molecules C) Both have identical pyrimidine bases D) Both are polymers of nucleotides

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Question 584 Medium

If a cell has twice as much DNA as in a normal functional cell, it means that the cell ______ ?

A) has completed division B) is preparing to divide C) has ceased to function D) has reached the end of its lifespan

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Question 585 Medium

A nucleosome is a portion of the chromonema containing ______ ?

A) both DNA and histones B) only histones C) both DNA and RNA D) only DNA

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Question 586 Hard

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?

A) Both the strands of DNA will be radio active B) One strand radio active C) Each strand half radio active D) None is radio active

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Question 587 Easy

Ribosomal RNA is actively synthesized in?

A) Nucleoplasm B) Ribosomes C) Lysosomes D) Nucleolus

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Question 588 Easy

What is true about ribosomes?

A) These are found only in eukaryotic cells B) These are self-splicing introns of some RNAs. C) The prokaryotic ribosomes are 80S, where S stands for sedimentation coefficient D) These are composed of ribonucleic acid and proteins

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Question 589 Medium

Select the correct statement from the following regarding cell membrane ?

A) Lipids are arranged in a bilayer with polar heads towards the inner part. B) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson. C) Na+ and K+ ions move across cell membrane by passive transport. D) Proteins make up 60 to 70% of the cell membrane

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Question 590 Medium

Which one of the following does not differ in E.coli and Chlamydomonas?

A) Cell wall B) Cell membrane C) Ribosomes D) Chromosomal organization

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