Immunity

Question 1

Describe post transcriptional change of mrna in the nucleus before translation

Answer 1

During transcription both introns and exons are copied into mRNA called pre mRNA
Sections of dna that dont code for amino acids (introns) are removed through splicing
Exons remain and join forming mrna strand

Question 2

Alternative splicing

Answer 2

When exons are removed during the post transcriptional changes as well as introns
Forming different mRNA strands
So more than one sequence and thus more than 1 protein can be produces from one gene

Question 3

3 aids symptoms

Answer 3

Munor infections if mucus membranes in nose ears genitals
Recurring respiratory infections
Chronic diarrhoea/ TB
toxoplasmosis of brain- parasite infection

Question 4

3 hiv symptoms

Answer 4

Swollen lymph nodes
Fever
Headaches

Question 5

TB sumptoms

Answer 5

Coughing blood
Weight loss
Fever

Question 6

Bacteriostatic antibiotic

Answer 6

substance that can inhibit the growth of bacteria