Select the wrong statement.

(1) Bacterial cell wall is made up of peptidoglycan

(2) Pili and fimbriae are mainly involved in motility of bacterial cells

(3) Cyanobacteria lack flagellated cells

(4) Mycoplasma is a wall-less microorganism

Subtopic:  Details of Prokaryotic Cell Structure |
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A cell organelle containing hydrolytic enzyme is

(1) lysosome                         

(2) microsome

(3) ribosome                         

(4) mesosome

Subtopic:  Endomembrane System (Lysosomes) |
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Microtubules are the constituents of

(1) spindle fibres, centrioles and cilia

(2) centrioles, spindle fibres and chromatin

(3) centrosome, nucleosome and centrioles

(4) cilia, flagella and peroxisomes

Subtopic:  Cytoskeleton |
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Mitochondria and chloroplast are

I.semi-autonomous organelles.

II. formed by division of pre-existing organelles and they contain DNA but lack protein synthesizing machinery.

Which one of the following options is correct?

(1) Il is true but I is false

(2) I is true but ll is false

(3) Both I and I are false

(4) Both I and II are correct

 

Subtopic:  Plastids | Mitochondria |
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A complex of ribosomes attached to a single strand of RNA is known as

(1) polymer

(2) polypeptide

(3) okazaki fragment

(4) polysome

Subtopic:  Ribosome and Inclusion Bodies |
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Which of the following is not a feature of the plasmids?

(a) Circular structure

(b) Transferable

(c) Single-stranded

(d) Independent replication

Subtopic:  Details of Prokaryotic Cell Structure |
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Water soluble pigments found in plant cell vacuoles are

(1) chlorophylls

(2) carotenoids

(3) anthocyanins

(4) xanthophylls

Subtopic:  Plastids |
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Balbiani rings are sites of

1. lipid synthesis

2. nucleotide synthesis

3. polysaccharide synthesis

4. RNA and protein synthesis

Subtopic:  Nucleus: Chromosomes |
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Which of the following are not membrane-bound?

1. Vacuoles

2. Ribosomes

3. Lysosomes

4. Mesosomes

Subtopic:  Ribosome and Inclusion Bodies |
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A protoplast is a cell

a.  without plasma membrane

b.  without nucleus

c.  undergoing division

d.  without cell wall

 

Subtopic:  Cell Wall |
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