LABORATORY REVIEW
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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DNA replication is semi-conservative.
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The polymerase chain reaction can be used.
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They need the hormone for growth.
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The genetic code is universal.
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Detailed explanation-1: -The genetic code is universal, and enables bacteria to produce human growth hormones. The correct option is d.
Detailed explanation-2: -Recombinant DNA technology, known popularly as gene splicing, has made it possible to modify bacteria to produce the human hormone.
Detailed explanation-3: -With a few exceptions (some prokaryotes, mitochondria, chloroplasts), the genetic code is universal – it’s the same in all organisms from viruses and bacteria to humans. The table of the Standard Universal Genetic Code on the next page shows the RNA version of triplet codons and their corresponding amino acids.
Detailed explanation-4: -DNA is considered a universal genetic code because every known living organism has genes made of DNA. Bacteria, fungi, cats, plants, and you: every organism uses DNA to store genetic information. All organisms also use DNA to transcribe RNA, and then they translate that RNA into proteins.
Detailed explanation-5: -The GH1 gene provides instructions for making the growth hormone protein. Growth hormone is produced in the growth-stimulating somatotropic cells of the pituitary gland, which is located at the base of the brain. Growth hormone is necessary for the normal growth of the body’s bones and tissues.