661. Proteins are conducted in the body in the form of

A Amino acids
B Natural proteins
C Enzymes
D Nucleic acids
Answer :   Amino acids
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662. Prions consists mainly of

A Protein
B DNA
C RNA
D Both DNA and RNA
Answer :   Protein
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663. Length of one loop of B- DNA

A 3.4 nm
B 0.34 nm
C 20 nm
D 10 nm
Answer :   3.4 nm
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664. Chlor - zinc iodide (schultz solution) stains

A Cellulsoe
B Protein
C Chitin
D Lipid
Answer :   Cellulsoe
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665. In true solution size of solute particles is

A Less then 0.001 μ
B 0.001 - 0.1 μ
C More than 0.1 μ
D None of the above
Answer :   Less then 0.001 μ
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666. A prokaryotic cell lacks

A Cell wall
B Cell membrane
C Cytoplasm
D Nucleolus
Answer :   Nucleolus
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667. Outer most covering of chromomsome is called

A Tonoplast
B Pellicle
C Unit membranne
D Mesosome
Answer :   Pellicle
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668. A major break through in the studies of cells came with the development of electron microscope. This is because

A the resolving power of the electron microscope is 200-350 nm as compared to 0.1-0.2 for the light microscope
B electron beam can pass through thick materials, whereas light microscopy requires thin sections
C the electron microscope is more powerful than the light microscope as it uses a beam of electrons which has wavelength much longer than that of photons
D the resolution power of the electron microscope in much higher than that of the light microscope
Answer :   the resolution power of the electron microscope in much higher than that of the light microscope
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669. The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:

A Microtubules
B Microfilaments
C Intermediate filaments
D Lamins
Answer :   Microfilaments
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670. Larger subuit of ribosome is dome shaped and attached to ER by

A Ribophorins
B Aminoacid
C Ca+2
D Hydrogen bonds
Answer :   Ribophorins
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