BIO 1000 Lecture Notes - Lecture 15: Lipid Bilayer, Cell Membrane, Passive Transport
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Which can cross the phospholipid bilayer of a membrane without assistance from transport proteins?
A. | Ions such as Na+. | |
B. | Small hydrophobic molecules such as O2. | |
C. | Small hydrophilic molecules such as glucose. | |
D. | Any small molecule or ion. |
QUESTION 2
Which transport process requires a cell to expend energy?
A. | Moving a solute up its concentration gradient. | |
B. | No transport processes require energy. | |
C. | Moving a solute either up or down its concentration gradient. | |
D. | Moving a solute down its concentration gradient. |
QUESTION 3
Imagine a cell whose membrane is permeable to water, but impermeable to solute X. If solute X is more concentrated outside the cell than inside, which way will water move by osmosis?
A. | Water will not move in either direction, in or out of the cell. | |
B. | Water will move equally in both directions, in and out of the cell. | |
C. | Water will leave the cell. | |
D. | Water will enter the cell. |
QUESTION 4
The cellular structure that encloses the DNA/genes is the
ribosome. | ||
plasma membrane. | ||
nucleus. | ||
mitochondrion. |
QUESTION 5
The part of metabolism that builds larger, more complex molecules or structures from smaller, simpler components is | |
A. | anabolism. | |
B. | catabolism. | |
C. | catalysis. | |
D. | hydrolysis. |
QUESTION 6
In an exergonic reaction
A. | the reactants have more energy than the products, so energy is absorbed. | |
B. | the reactants have more energy than the products, so energy is released. | |
C. | the reactants have less energy than the products, so energy is released. | |
D. | the reactants have less energy than the products, so energy is absorbed. |