Biology 101 - Life Science Practice Questions - Dr. Daley
Cell Structure and Function
1. Exocytosis and endocytosis are accomplished by the
A. nucleus.
B. mitochondria.
C. cell membrane.
D. endoplasmic reticulum.
2. A hypertonic solution contains
A. equal amounts of solute and water.
B. a greater concentration of solute than does cytoplasm.
C. a lesser concentration of solute than does cytoplasm.
D. water with no solute.
3. Which is part of the enzyme?
A. substrate
B. product
C. active site
D. reactant
E. None of the choices are correct.
4. In __________, a molecule is transported down its concentrationgradient (from a greater to a lesser concentration) by a carrier with no energy expenditure.
A. facilitated transport
B. active transport
C. osmosis
D. diffusion
5. Most coenzymes are at least in part
A. proteins.
B. carbohydrates.
C. enzymes.
D. vitamins.
E. All of the choices are correct.
6. The cell membrane is composed of
A. cellulose.
B. cellulose and protein.
C. lipid only.
D. lipid and protein.
7. The electron transport system functions within the
A. mitochondria.
B. cytoplasm.
C. nucleus.
D. lysosome.
8. Proteins do not pass through cell membranes because
A. the membrane is made of protein.
B. they contain nitrogen.
C. they are very large molecules.
D. they cause emulsification.
9. Centrioles
A. consist of 2 parallel cylinders.
B. are composed of microtubules.
C. carry on cellular respiration.
D. are found in plant cells.
E. are composed of actin.
10. Proteins that are destined to be exported outside the cell are made in the
A. rough endoplasmic reticulum.
B. smooth endoplasmic reticulum.
C. free ribosomes in the cytoplasm.
D. None of the choices are correct.