BIO 111 Chapter 7 Review

BIO 111 Chapter 7 Review

University: Gaston College

Course: General Biology I (BIO 111)

15 Documents

Students shared 15 documents in this course

How does the “fluid mosaic model” describe the structure of the plasma membrane? –

Proteins in the membrane contribute to the mosaic quality of the membrane while the

lateral and rotational movements of phospholipids contribute to its fluidity.

Which of the following cell structures exhibits selective permeability between a cell and

its external environment? – Plasma membrane

What function do carbohydrates fulfill in the plasma membrane? – Cell-to-cell

recognition

Which of the following statements concerning carbohydrates associated with the plasma

membrane is correct? – Membrane carbohydrates function primarily in cell-cell

recognition.

A cell is placed into a solution and the cell shrinks. Which of the following is true

regarding the solution? – The solution is hypertonic.

Cells A and B are the same size, shape, and temperature, but cell A is metabolically

less active than cell B; cell B is actively converting oxygen to water in cellular

respiration. Oxygen will diffuse more rapidly into cell __________ because

__________. – B; the diffusion gradient in cell B is steeper

Which of the following statements about diffusion is true? – It is a passive process.

Which of the following is correct regarding integral proteins? – These proteins exhibit

both hydrophilic and hydrophobic properties.

Which of the following is correct regarding peripheral proteins? – These proteins are

found only on the surface of the plasma membrane.

Which of the following is a correct difference between active transport and facilitated

diffusion? – Active transport requires energy from ATP, and facilitated diffusion does not.

A nursing infant is able to obtain disease-fighting antibodies, which are large protein

molecules, from its mother’s milk. These molecules probably enter the cells lining the

baby’s digestive tract via which process? – Endocytosis

All cells have voltages across their membranes. This voltage is called a(n) __________

and is often maintained by __________. – membrane potential; electrogenic pumps

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