Q. No.In gene mutation, adenine is replaced by guanine. It is
1. Frame-shift mutation
2. Transcription
3. Transition
4. Transversion
1. Frame-shift mutation
2. Transcription
3. Transition
4. Transversion
In bacterial DNA replication, synthesis starting from the site of origin of replication
1. Involves RNA primers
2. Requires telomerase
3. Proceeds unidirectionally
4. Moves bidirectionally
DNA fingerprinting is related to:
| 1. | Molecular analysis of profiles of DNA samples |
| 2. | Analysis of DNA samples using imprinting devices |
| 3. | Techniques used for molecular analysis of different specimens of DNA |
| 4. | Techniques used in the identification of fingerprints of different persons |
A nutritionally wild-type organism that does not require additional biochemicals is:
| 1. | Prototroph | 2. | Auxotroph |
| 3. | Phenotype | 4. | Autotroph |
On which organism Beadle and Tatum worked to propose one gene-one enzyme hypothesis
1. Drosophila
2. Escherichia coli
3. Neurospora crassa
4. Nostoc
Protein synthesis in an animal cell occurs
1. On cytosolic ribosomes only
2. On ribosomes attached to E.R. and nuclear envelope
3. On ribosomes present in nucleolus as well as cytoplasm
4. On ribosomes present both in cytoplasm as well as mitochondria.
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.
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
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