Link together two pieces of DNA
Answer: Cut DNA at specific locations
The sequence of structural gene in lac operon concept is
Answer: lac Z, lac Y, lac A
mRNA directs the building of proteins through a sequence of
In the DNA molecule:
Answer: There are two strands which run antiparallel-one in 5′ → 3′ direction and other in 3′ → 5′
What are those structures that appear as 'beads-on-string' in the chromosomes when viewed under electron microscope?
The sections of a structural gene that are expressed are the ______.
Which one of the following techniques made it possible to genetically engineer living organisms?
Answer: Recombinant DNA techniques
The sequence of nitrogen bases in a particular region of the noncoding strand of a DNA molecule was found to be CAT GTT TAT CGC. What would be the sequence of nitrogen bases in the mRNA that is synthesized by the corresponding region of the coding strand in that DNA?
Enzyme responsible for reverse transcription is :
Answer: Reverse transcriptase
Gel electrophoresis is used for
Answer: Separation of DNA fragments according to their size
What is not true for genetic code?
Answer: A codon in mRNA is read in a non-contiguous fashion
What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA
Answer: A polypeptide of 24 amino acids will be formed
The anti-parallel nature of DNA refers to
Answer: The opposite direction of the two strands
Protein synthesis in an animal cell occurs
Answer: On ribosomes presents in cytoplasm as well as in mitochondria
Miscellaneous GK Questions