Biology 9700/21 — October/November 2011
Cambridge AS Level · AS Level Structured Questions · worked solutions for every part, with the mark scheme
Topics Nucleic Acids and Protein Synthesis · Cell Membranes and Transport · Enzymes · Biological Molecules · The Mitotic Cell Cycle · Infectious Diseases · +2 more
Fig. 1.1 is a diagram of a cell surface membrane.
Use a label line and the appropriate letter to label each of the following on Fig. 1.1.
P protein for active uptake of potassium ions
Q protein for facilitated diffusion of polar molecules
R receptor site for a hormone
S hydrophilic heads of phospholipids on the internal surface of the membrane
T molecule that modifies the fluidity of the membrane
Some cells take in bacteria by endocytosis.
Explain how endocytosis occurs at a cell surface membrane.
The rest of this paper
5 more questions- Q2Enzymes · Nucleic Acids and Protein Synthesis12M
- Q3Biological Molecules · Nucleic Acids and Protein Synthesis9M
- Q4The Mitotic Cell Cycle · Infectious Diseases10M
- Q5Transport in Plants11M
- Q6Immunity10M