Top answers

Describe 3 adaptations the ileum has that allow it to maximise the absorption of nutrients from its lumen into surrounding blood vessels.

The ileum is lined with simple cuboidal epithelium. This means there is a short diffusion pathway from the lumen of the gut to the surrounding blood vessels. The lining epithelia also has villi and the epith...
AK
Answered by Aliza K. • Biology tutor
13356 Views

Describe the stages of Transcription

Transcription is the process where RNA is copied from DNA. DNA is a made up of two strands which makes a double helix. In order for transcription to occur, the two DNA strands must come apart. The DNA strand...
HU
Answered by Hajrah U. • Biology tutor
3438 Views

Describe the process of DNA replication.

An enzyme called DNA helices breaks the hydrogen bonds between the bases on two polynucleotide strands of DNA, forming two single strands. Each original strand acts as a template for a new strand. Complement...
ZW
Answered by Zak W. • Biology tutor
14090 Views

Explain what are the primary, secondary, tertiary and quaternary structures of a protein

The primary structure is the sequence of amino acids. It defines the role of the protein as all the other structures are based off of it. The secondary structure dictates whether the protein is folded into a...
AN
Answered by Anastasia N. • Biology tutor
9965 Views

What are the different steps of aerobic respiration?

Respiration can be broken down into four main stages: glycolysis, the link reaction, the Krebs cycle (or citric acid cycle), and the electron transport chain. Glycolysis is the process through which glucose ...
IC
Answered by Isabel C. • Biology tutor
5409 Views