A sequential expression of a set of human genes occurs when a steroid molecule binds to the

• transfer RNA

• messenger RNA

• DNA sequence

• DNA sequence

Which antibiotic inhibits interaction between t-RNA and m-RNA during bacterial protein synthesis?

• Erythromycin

• Neomycin

• Streptomycin

• Streptomycin

In which mode of inheritance do you expect more maternal influence among the off spring?

• Autosomal

• Cytoplasmic

• Y-linked

• Y-linked

Amino acid sequence, in protein synthesis is decided by the sequence of

• t-RNA

• m-RNA

• c-DNA

• c-DNA

One turn of the helix in a B-form DNA is approximately

• 20 nm

• 0.34 nm

• 3.4 nm

• 3.4 nm

Antiparallel strands of a DNA molecule means that

• one strand turns anti-clockwise

• the phosphate groups of two DNA strands, at their ends, share the same position

• the phosphate groups at thestart of two DNA strands are in opposite position (pole)

• the phosphate groups at thestart of two DNA strands are in opposite position (pole)

77.

The final proof for DNA as the genetic material came from the experiments of

• Griffith

• Hershey and Chase

• Avery, Mcleod and McCarty

• Avery, Mcleod and McCarty

Which of the following are not polymeric?

• Nucleic acids

• Proteins

• Polysaccharides

• Polysaccharides

The association of histone H1 with a nucleosome indicates:

• Transcription is occurring

• DNA replication is occurring

• The DNA is condensed into a Chromatin Fibre

• The DNA is condensed into a Chromatin Fibre

DNA fragments are

• Positively charged

• Negatively charged

• Neutral

• Neutral