Biology 9700/23 — October/November 2010

Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme

questions

marks

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Topics Cell Membranes and Transport · Nucleic Acids and Protein Synthesis · Infectious Diseases · Biological Molecules · Enzymes · Transport in Plants · +3 more

Q1Cell Membranes and TransportNucleic Acids and Protein SynthesisFree sample

Fig. 1.1 shows a diagram of part of a cell surface membrane.

Fig. 1.1

(a)

(i)

Name molecules A and B.

A ______

B ______

(ii)

Explain how the features of molecules of A cause them to form a layer in the membrane as seen in Fig. 1.1.

(b)

State the functions of C and D.

C ______

D ______

(c)

Structure E is a protein composed of 588 amino acids.

Calculate the minimum number of nucleotide base pairs required in the gene coding for this protein. Show your working.

Answer = ______

The rest of this paper

5 more questions

Q2Infectious Diseases10M
Q3Biological Molecules · Enzymes · Transport in Plants11M
Q4Immunity10M
Q5Gas Exchange9M
Q6(outdated) Ecology11M

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