Skip to content

Course home

Sign up

Excretion as an example of homeostatic control

EasyMediumHard
12345
Question 4

Which statement correctly describes a step in the process of urea production in the human liver?

A

Amino acids are converted directly into urea during the process of transamination.

B

Ammonia, produced by the deamination of excess amino acids, combines with carbon dioxide in the ornithine cycle to form urea.

C

The ornithine cycle occurs in the kidneys to convert ammonia into urea.

D

Urea is significantly more toxic than ammonia and is produced to prevent cellular damage.

Markscheme

Excretion as an example of homeostatic control Questions

  1. A Level
  2. /Biology
  3. /Excretion as an example of homeostatic control

17 exam-style questions on OCR A A Level Biology Excretion as an example of homeostatic control. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank