B Module 2

Question 1

Property of water

Answer 1

Acts as a coolant
Keeps constant stable in environment in cells as enzymes only work in narrow range of temperatures

Question 2

The peptide bonds in polypeptide chains are catalysed by…

Answer 2

The enzyme petidyl transferase
It happens between -OH of carboxylic and one H of amine group.

Question 3

DNA synthesis

Answer 3

DNA molecule is too large to pass through nucleus therefore a short section of DNA-gene is transcribed into a short messenger RNA molecule.

Question 4

ER encloses..

Answer 4

Cisternea

Question 5

Genetic Code-Triplet Code-Codon-Degenerate code

Answer 5

Genetic Code-The idea that DNA must code for a sequence of amino acids.
The code in the base sequenced is a simple triplet code.It is a sequence of three bases,called a codon.Each codon codes for an amino acid.
Degenerate Codes: there are three stop codons.Having a single ‘start’ codon ensures bases are read in ‘frame’.

Question 6

Degen