Question

Choose the false statement:

A) The specificity of base pairing refers to the combinations of nucleotide bases that are able to hydrogen bond with each other across adjacent strands of the double helix.

B) The specificity of base pairing is only important in two cellular processes, transcription and translation.

C) The term semiconservative is applied to the DNA replication process; here each replicated chromosome is composed of one newly synthesized strand, and the other strand comes from the original chromosome.

Choose the false statement:

A) Base substitutions (point mutations) only affect the nucleotide sequence of a single codon.

B) Mutations that result from the insertion or deletion of a nucleotide are generally considered to be much more serious than those where one base is substituted for another.

C) Since humans carry only 22,000 genes, this tells us that our cells are only capable of making a maximum of 22,000 different proteins.

Multiple choice: From a genetic (genomic) perspective, which of the following represents the biggest, most audacious, evolutionary change in the history of life on planet earth:

A) Apes to humans

B) Dinosaurs to birds and mammals

C) Prokaryotic to eukaryotic cells

D) Unicellular eukaryotes to multicellular eukaryotes

E) Marine algae to terrestrial plants

Answer 1

B) The specificity of base pairing is only important in two cellular processes, transcription and translation

EXPLANATION :

Not only transcription and translation but also in replication process where the specificity of base pairing is an important

C) Since humans carry only 22,000 genes, this tells us that our cells are only capable of making a maximum of 22,000 different proteins

EXPLANATION

Alternative splicing is a process which lead to diversity in protein formation from single gene and post translation modification process lead diversity in protein. thus it does not support that if number of gene are 22000 then maximum protein will be 22000. There are huge diversity of protein in human which is greater than 22000.

C) Prokaryotic to eukaryotic cells

EXPLANATION

If we look at genomic prospective the evolution of prokaryotic to eukaryotic cell had major impact which has been supported by the endosymbiotic theory as well.