Answer the following statements true (T) or false (F)

1. Plant cell membranes contain cholesterol.
2. Membrane proteins are attached to or embedded in the phospholipid bilayer.
3. The presence of integral proteins allows membranes to be selectively permeable to certain molecules.
4. Freeze fracture electron microscopy allows one to observe the two-dimensional cross section of membrane proteins.


1. FALSE
2. TRUE
3. TRUE
4. FALSE

Biology & Microbiology

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What will be an ideal response?

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The production of female gametes begins when a mass of tissue, called the ____, starts growing on the inner wall of

an ovary. a. zygote b. ovule c. endosperm

d. carpel e. stigma

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To which of the following substances does hemoglobin most readily bind?

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