Q. No.During transcription, holoenzyme RNA polymerase binds to DNA sequence and DNA assumes a saddle like
structure at that point. The sequence is called
1. AAAT box
2. TATA box
3. GGTT box
4. CAAT box.
structure at that point. The sequence is called
1. AAAT box
2. TATA box
3. GGTT box
4. CAAT box.
Amino acid sequence in protein synthesis is determined by sequence of
1. rRNA
2. tRNA
3. mRNA
4. cDNA.
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Antiparallel strands of DNA molecules means:
| 1. | One strand turns clockwise |
| 2. | One strand turns anticlockwise |
| 3. | Phosphate groups of the two strands share the same position on their ends |
| 4. | Phosphate groups at the start of the DNA strands are in the opposite position |
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Okazaki fragments during DNA replication
1. Polymerise in 3’ → 5’ direction and form replication fork
2. Prove semiconservative DNA replication
3. Polymerise in 5’ → 3’ direction and explain 3’ → 5’ DNA replication
4. Cause transcription
A sequential expression of a set of human genes occurs when a steroid molecule binds to
1. mRNA
2. DNA sequence
3. tRNA
4. Ribosome
The two polynucleotide chains of DNA are
1. Discontinuous
2. Antiparallel
3. Parallel
4. Semiconservative
In the DNA molecule
1. The proportion of adenine in relation of thymine varies with the organism
2. There are two strands which run antiparallel one in 5’ → 3’ direction and other in 3’ → 5’
3. The total amount of purine nucleotides and pyrimidine nucleotides is not run always equal
4. There are two strands which run paralled in the 5’ → 3’ direction.
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Which one of the following pairs of codons is correctly matched with their function or the signal for the
particular amino acid ?
1. AUG, ACG – start/methionine
2. UUA, UCA – Leucine
3. GUU – Alanine
4. UAG, UGA – stop
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What is not for genetic code
1. It is unambiguous
2. A codon in mRNA is read in a non-contiguous fashion
3. It is nearly universal
4. It is degenerate
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Semiconservative replication of DNA was first demonstrated in
1. Salmonella typhimurium
2. Drosophila melangaster
3. Escherichia coli
4. Streptococcus pneumonia
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