Exam Q

Question 1

Describe how a l dipeptide is formed 3

Answer 1

Peptide bond
Between carboxyl group of 1a.a and amino group of another a.a
Through C.R

Question 2

3 functions of protein and their usage

Answer 2

Enzymes - synthesis (SC DNA rep) or metabolism eg digestion
Antibodies - involve in immune system
Transport protein -transport molecules and ions across membrane

Question 3

Give 2 functions of cel vacuole and describe its structure

Answer 3

Maintain pressures/ keep cell rigid
Isolate unwanted chemicals inside dvd cell
Has cell sap ( solution) set rounded by Tonoplast (membrane)

Question 4

Cholera is a diseach caused by prokaryotic organism called vibrio cholerae
A) name polymer taht makes up cell wall of vibrio cholerae 1
B) outline process by which vibrio cholerae replicate 3
C) there are different stains of vibrio cholerae one stain has a capsule. Another does not suggest how having a capsule might benefit vibrio cholerae

Answer 4

A) murein
B) binary fission dna loop replicates once plasmids many times cell gets bigger and loop and plasmids move to opposite poles of the cell cytoplasm divides and cell wall reform
C) protects bacteria from attacks of immune system