Q. No.DNA or RNA segment tagged with a radioactive molecule is called:
1.
vector
2.
probe
3.
clone
4.
plasmid
Satellite DNA is a useful tool in:
1. Organ transplantation
2. Sex determination
3. Forensic science
4. Genetic engineering
Semiconservative replication of DNA was first demonstrated in:
1. Drosophila melanogaster
2. Escherichia coli
3. Streptococcus pneumoniae
4. Salmonella typhimurium
What is not true for genetic code?
1. A codon in mRNA is read in non-contiguous fashion
2. It is nearly universal
3. It is degenerate
4. It is unambiguous
| 1. | The total amount of purine nucleotides and pyrimidine nucleotides is not always equal |
| 2. | There are two strands, which run parallel in the 5' → 3’ direction |
| 3. | The proportion of adenine in relation to thymine varies with the organism |
| 4. | There are two strands, which run antiparallel - one in 5' → 3’ direction and the other in 3’→ 5’ |
1. GUU, GCU - Alanine
2. UAG, UGA - Stop
3. AUG, ACG - Start/methionine
4. UUA, UCA -Leucine
Which one of the following pairs of nitrogenous bases of nucleic acids is wrongly matched with the category mentioned against it?
1. Thymine, Uracil - Pyrimidines
2. Uracil, Cytosine - Pyrimidines
3. Guanine, Adenine - Purines
4. Adenine, Thymine - Purines
The length of the DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is this DNA accommodated?
1. Deletion of non-essential genes
2. Super-coiling in nucleosomes
3. DNAse digestion
4. Through the elimination of repetitive DNA
Differentiation of organs and tissues in a developing organism is associated with:
1. developmental mutations
2. differential expression of genes
3. lethal mutations
4. deletion of a gene
The two polynucleotide chains in DNA are:
1. parallel
2. discontinuous
3. antiparallel
4. semiconservative
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