Exam questions

Question 1

What is the genetic code? What is a gene?

Answer 1

Codes for amino acids. Sequence of bases thst codes for a polypeptide

Question 2

Describe binary fission in bacteria?

Answer 2

First there is replication of the circular DNA. Then the plasmids are replicated.Then there is division of the cytoplasm to produce daughter cells

Question 3

Describe and explain 1 feature of the alveolar epithelium that makes the epithelium well adapted as a surface for gas exchange

Answer 3

They are permeable which allows diffusion of oxygen and CO2

Question 4

Describe how a phosphodiester bind is formed between 2 nucleotides within an DNA molecule

Answer 4

Condensation reaction between phosphate and deoxyribose catalysed by DNA polymerase

Question 5

Give 2 examples in which genetic diversity is measured (8.1)

Answer 5

Comparing characteristics
Comparing primary structures

Question 6

Describe process of lipid absorption

Answer 6

The micelles break down and add to a pool of fatty acids and monoglycerides that are dissolved in the small intestine solution surrounding the epithelial cells. These freely dissolved molecules enter the epithelial cell by diffusion

Question 7

Where are introns found

Answer 7

Between exons within genes

Question 8

What is the naming system where animals are named called?

Answer 8

Binomial naming system