Molecular Biology and Genetics MCQs

The formation of peptide cross links between adjacent glycan chains in cell wall synthesis is called

In a relatively large but finite and closed population of sexually reproducing diploid organisms, the frequency of homozygous genotype PP changes from 0.40 to 0.50 and that of pp changes from 0.40 to 0.41 in a span of 10 generations. Which of the following is the most likely cause for the above change in frequency of the PP genotype?

A protein is phosphorylated at a serine residue. A phosphomimic mutant of the protein can be generated by substituting that serine with

Under alkaline conditions, DNA is more stable than RNA because

True breeding Drosophila flies with curved wings and dark bodies were mated with true breeding short wings and tan body Drosophila, The F1 progeny was observed to be with curved wings and tan body. The F1 progeny was again allowed to breed and produced flies of the following phenotype, 45 curved wings tan body, 15 short wings tan body, 16 curved wings dark body and, 6 short wings dark body. The mode of inheritance is

The enzyme which adds phosphate group to the free 5' terminus of a DNA sequence is

The fundamental feature of the genetic code which allows the expression of a protein in any host is its

Match the terms in Group I with their possible explanation in Group II Group I Group II P. Orthologs 1. A cell or an organism, having foreign gene Q. Paralogs 2. The complement of a protein expressed by a genome R. Proteome 3. Genes from different species related to each other S. Transgenic 4. Genes from same species related to each other

Which one of the following amino acids in proteins does not undergo phosphorylation?