Question 2(c)(iii)
[Maximum number: 2]
Fig. 2.1 is a diagram of part of a DNA molecule.
Fig. 2.1
DNA controls cell function by controlling the production of proteins.
State two types of cell membrane proteins.
1
2
IGCSE Biology Extended 17.1.7—DNA controls cell function Topic Practice
17.1.7—DNA controls cell function
• Explain that DNA controls cell function by controlling the production of proteins, including enzymes, membrane carriers and receptors for neurotransmitters
Question 5(a)(iii)
[Maximum number: 2]
Fig. 5.1 shows the stages involved in protein synthesis.
Fig. 5.1
Explain why the sequence of amino acids is important in the production of receptor molecules for neurotransmitters.