Molecular Basis of Inheritance · Question 113

In eukaryotic cell transcription, RNA splicing and RNA capping take place inside the -

1. Dictyosomes
2. Ribosomes
3. Nucleus
4. ER

Which one of the following statements about the particular entity is true?

1. Nucleosome is formed of nucleotides
2. Centromere is found in animal cells, which produces aster during cell division
3. The gene for producing insulin is present in every body cell
4. DNA consists of a core of eight histones

Which one of the following does not follow the central dogma of molecular biology ?

1. Mucor
2. HIV
3. Chlamydomonas
4. Pea

The one aspect which is not a salient feature of genetic code, is its being –

1. Specific
2. Degenerate
3. Ambiguous
4. Universal

Select the two correct statements out of the four (A–D) statements given below about lac operon. The correct statements are :

1. B and D
2. A and B
3. B and C
4. A and C

Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet"?

1. Nirenberg and Matthaei
2. Morgan and Sturtevant
3. Hershey and Chase
4. Beadle and Tatum

Semi-conservative replication of DNA was first demonstrated in:

1. Drosophila melanogaster
2. Streptococcus pneumoniae
3. Salmonella typhimurium
4. Escherichia coli

Removal of introns and joining the exons in a defined order in a transcription unit is called:

1. Transformation
2. Capping
3. Splicing
4. Tailing

What is not true for genetic code?

1. It is nearly universal
2. A codon in mRNA is read in a noncontiguous fashion
3. It is degenerate
4. It is unambiguous

In the DNA molecule:

1. the total amount of purine nucleotides and pyrimidine nucleotides is not always equal
2. there are two strands which run antiparallel one in 5' 3' direction and other in 3' 5'
3. there are two strands which run parallel in the 5' 3' direction
4. the proportion of adenine in relation to thymine varies with the organism