One role of the cell surface membrane is to control the entry and exit of substances. (a) Complete Table 1.1 to show the transport mechanisms across cell surface membranes and examples of materials transported. Table 1.1 transport mechanism across cell surface membrane example of material transported across membrane --- --- active transport sodium ions oxygen molecules bacteria exocytosis mucin (for mucus) facilitated diffusion osmosis (b) Each transport mechanism across…

Biology 9700/22 — May/June 2012

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

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Topics Nucleic Acids and Protein Synthesis · Biological Molecules · Cell Membranes and Transport · Cell Structure · Immunity · The Mitotic Cell Cycle · +5 more

Q1Cell Membranes and TransportFree sample

One role of the cell surface membrane is to control the entry and exit of substances.

(a)

Complete Table 1.1 to show the transport mechanisms across cell surface membranes and examples of materials transported.

Table 1.1

transport mechanism across cell surface membrane	example of material transported across membrane
active transport	sodium ions
	oxygen molecules
	bacteria
exocytosis	mucin (for mucus)
facilitated diffusion
osmosis

(b)

Each transport mechanism across cell surface membranes has a characteristic set of features.

In each of the boxes below, state one example of a transport mechanism that matches the pathway shown.

Fig. 1.1

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5 more questions

Q2Cell Structure · Immunity · The Mitotic Cell Cycle13M
Q3Transport in Plants · Nucleic Acids and Protein Synthesis · Gas Exchange16M
Q4Nucleic Acids and Protein Synthesis · Biological Molecules8M
Q5Infectious Diseases · Enzymes10M
Q6(outdated) Ecology · Biological Molecules · Nucleic Acids and Protein Synthesis7M

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