MCQ
When more than one codon codes for the same amino acid, what is this called?
- AUniversal nature of genetic code
- BRedundancy of genetic code
- CPunctuation in genetic code
- DContinuous nature of genetic code
Explanation:
The genetic code has 64 codon and each specifies only one amino acids but there are some codons such as GAA and GAG both specify one amino acid i.e., glutamic acid and are called as redundancy or degeneracy.
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$(a)$ Pro-hormone insulin contain extra stretch of C-peptide
$(b)$ A-peptide and B-peptide chains of insulin were produced separately in E.coli, extracted and combined by creating disulphide bond between them.
$(c)$ Insulin used for treating Diabetes was extracted from Cattles and Pigs.
$(d)$ Pro-hormone Insulin needs to be processed for converting into a mature and functional hormone.
$(e)$ Some patients develop allergic reactions to the foreign insulin.
Choose the most appropriate answer from the options given below:
$I.$ In microinjection method foreign $DNA$ is directly injected into the nucleus of animal cell or plant cell by using micro needles or micro pipettes
$II.$ Microinjection method is used in oocytes, eggs and embryo
$III.$ Electroporation is the formation of temporary pores in the plasma membrane of host cell by using lysozyme or calcium chloride
$IV.$ In chemical mediated gene transfer method certain chemicals such as $\mathrm{CO}_{2}$ help foreign $DNA$ to enter the host cell
Which of the statements given above are correct?