Reading Quiz 3: Membranes & Membrane Transport, Chapter 5
This quiz is on Membranes/Membrane transport: Ch 5.
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Mark 1.00 out of 1.00 0 qaid=442618&qub 0
Which of the following is NOT true regarding facilitated transport across a membrane?
a. The rate of transport will plateau when transporters are saturated.
b. It is usually highly specific in terms of the substrate that is transported.
c. It requires transport proteins.
d. It involves movement of substances against the concentration gradient.
The correct answer is: It involves movement of substances against the concentration gradient.
Mark 1.00 out of 1.00
0 qaid=442623&qub 0
Which of the following statments about membrane protein is true?
a. membrane protein are more mobile and move faster than lipids within the membrane.
b. recepto proteins are usually found on the inner surface of the membrane. c. some membrane proteins do not move at all within the membrane.
d. Protein makes up 50% of myelin membrane in nerve fibres.
The correct answer is:
some membrane proteins do not move at all within the membrane.
Mark 1.00 out of 1.00
0 qaid=442615&qub 0
The ____ component of the cell membrane functions as a selective barrier, while the ____ component has specific
functions such as transport, recognizing other cells, and binding to other cells.
a. lipid; carbohydrate
b. carbohydrate; protein
c. protein; lipid