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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Cellular organelles with membranes are 

1. nuclei, ribosomes and mitochondria

2. chromosomes, ribosomes and endoplasmic reticulum

3. endoplasmic reticulum, ribosomes and nuclie

4. lysosomes, Golgi apparatus and mitochondria.

Subtopic:  Mitochondria | Golgi Apparatus | Endomembrane System (Lysosomes) |
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The structures that are formed by stacking of organised flattened membranous sacs in the chloroplasts are 

1. cristae

2. grana

3. stroma lamellae

4. stroma

Subtopic:  Plastids |
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