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NEET biology

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Question
CBSEENBI11002029
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Microtubules are the constituent of

  • spindle fibres, centrioles and cilia

  • centrioles, spindle fibres and chromatin

  • centrosome, nucleosomes and centrioles

  • cilia, flagella and peroxisomes

Solution

A.

spindle fibres, centrioles and cilia

Microtubules are structures present in cilia, flagella, centrioles and spindle fibres. They are also the part of fibres found in cytoskeleton. 

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Question
CBSEENBI11002030
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Mitochondria and choloroplast are :
I. semi-autonomous organelles.
II. formed by division of pre-existing  organelles and they contain DNA but lack protein synthesizing machinery. 

  • II is true but I is false

  • I is true but II is false

  • Both I and II are false

  • Both I and II are correct

Solution

B.

I is true but II is false

Mitochondria and chloroplast have DNA and are capable of self-replication, thus they are semi-autonomous bodies
The organelles do synthesize some of protein and hence they have the protein synthesizing machinery. However, most of the proteins are derived from the nucleus. 

Question
CBSEENBI11002031
Wired Faculty App

Photosensitive compound in human eye is made up of

  • opsin and Retinal

  • opsin ans Retinol

  • transducin and Retinene

  • guanosine and Retinol

Solution

A.

opsin and Retinal

The photosensitive pigment Rhodopsin of the human eye is made up of opsin and Retinal ( the aldehyde form of vitamin-A/ Retinol). 

Question
CBSEENBI11002032
Wired Faculty App

Chrysophytes, euglenoids, dinoflagellates and slime moulds are included in the kingdom

  • Protista

  • Fungi

  • Animalia

  • Monera

Solution

A.

Protista

All the single celled eukaryotic organism are grouped under the Kingdom Protista. These includes euglenoids, dinoflagellates, slime moulds and chrysophytes

Question
CBSEENBI11002033
Wired Faculty App

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the 

  • thermoacidophiles

  • methanogens

  • eubacteria

  • halophiles

Solution

B.

methanogens

Methanogens are group of obligate anaerobic ancient and primitive bacteria. They are involved in the production of the methane gas which is used as a biogas.

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