Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

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111.

In the ribose of RNA, unlike DNA, every nucleotide residue has an additional

  • COOH group in the 2'position

  • OH group in the 5' position

  • OH group in the 2'position

  • Phosphate group in the 2' position

  • Phosphate group in the 2' position


C.

OH group in the 2'position

OH group in 2' - position of ribose sugar gives reactive nature of RNA.


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112.

Microsatellites are

  • Repetitive DNA sequences

  • ESTs

  • YAC

  • BAC

  • BAC


113.

DNA replicates semi-conservatively was first shown in

  • Vicia faba

  • E. coli

  • Streptococcus pneumoniae

  • Drosophila

  • Drosophila


114.

The enzyme that catalyses transcription of RNA in bacteria

  • DNA dependent RNA polymerase

  • RNA polymerase I

  • DNA polymerase

  • RNA polymerase II

  • RNA polymerase II


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115.

A molecule to act as a genetic material has the following properties

(i) should be able to replicate

(ii) should be structurally more stable

(iii) should be more reactive and labile

(iv) should provide scope for slow changes

Choose the correct option

  • (i), (ii) and (iii) are correct

  • (iii) alone is correct

  • (iii) and (iv) are correct

  • (i), (ii) and (iv) are correct

  • (i), (ii) and (iv) are correct


116.

Choose the correct statement among the following

  • Taylor and his colleagues used E.coli to prove semi-conservative replication of DNA

  • In Griffith's experiment the mice infected with R-strain of Streptococcus pneumoniae died due to pneumonia. 

  • Hershey and Chase proved the transforming principle experimentally

  • Meselson and Stahl grew staphylococcus in a medium containing cesium chloride to prove DNA is the genetic material

  • Meselson and Stahl grew staphylococcus in a medium containing cesium chloride to prove DNA is the genetic material


117.

A nanometre is

  • 10–9m

  • 10–4m

  • 10–6m

  • 10–12m

  • 10–12m


118.

The precursor of eukaryotic mRNA is

  • 5srRNA

  • tRNA

  • rRNA

  • snRNA

  • snRNA


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119.

The disorder caused by point mutation is

  • Down's syndrome

  • Sickle cell anemia

  • Klinefelter's syndrome

  • Tetany

  • Tetany


120.

Identify the wrongly labelled part

  • Primary follicle

  • Ovum

  • Graafian follicle

  • Corpus luteum

  • Corpus luteum


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