Practice Test:
Unit 1
Supplemental Instruction
Iowa State University / Leader: / Landon
Course: / Biology 212
Instructor: / Dr. Vleck
Date: / 9/20/10

1.) Cell membranes are semi permeable because the are always permeant to:

a.)Ions

b.)Calcium

c.)Cholesterol

d.)H20

e.)None of the above

2.) Which of the following will NOT change a protein function:

a.) Phosphorylation of a protein

b.) Temperature of the environment

c.) Sequence of the amino acid composition

d.) pH of environment

e.) None of the above

3.) Which of the following processes uses ATP synthase and the H+ gradient to synthesize ATP?

a.)Substrate-level phosphorylation

b.)Chemiosmosis

c.)Citric acid cycle

d.)Electron transport chain

e.)All of the Above

4.) Which of the following is NOT a product of glycolysis?

a.)H20

b.)NADH

c.)FADH2

d.)ATP

e.)Pyruvate

5.) The structural level of a protein in which alpha helixes are present in the

A. Primary level

B. Secondary level

C. Tertiary level

D. Quaternary level

6.) Facilitated diffusion transport

A. requires membrane channel or carrier protein.

B. requires ATP hydrolysis.

C. requires H+ cotransport.

D. requires membrane potential.

E. requires osmosis.

7.) The Na+, K+ pump

A. transports Na+ by its electrochemical gradient.

B. transports K+ out of the cell.

C. does not require an energy input.

D. conformation and ion affinity are changed by phosphorylation.

E. is an example of facilitated diffusion.

8.) Which of the following will NOT change a protein function?

A. sequence of the amino acid composition

B. pH of the environment

C. temperature of the environment

D. phosphorylation of the protein

E. none of the above

9.) Which of the following is the most likely movement for a plasma membrane protein?

A. ER  Vesicles  Golgi  Lysosome  Plasma Membrane

B. ER  Vesicles  Golgi  Vesicles  Plasma Membrane

C. Nucleus  ER  Golgi  Vesicles  Plasma Membrane

D. ER  Golgi  Lysosome  Vesicles  Plasma Membrane

E. Golgi  Vesicles  Lysosome  Vesicles  Plasma Membrane

10.) Match the following monomers to its polymers:

11. carbohydratesA. amino acids

12. lipidsB. nucleotides

13. proteinsC. sugars

14. nucleic acidsD. phospholipid

11.) Which of the following processes includes all others?

A. osmosis

B. diffusion of glucose down its concentration gradient

C. facilitated diffusion

D. diffusion of an ion down its electrochemical gradient

E. passive transport

12.) A ______is formed by a specific electrostatic interaction between an electronegative atom and a H atom.

A. Covalent bond

B. Peptide bond

C. Hydrogen bond

D. Ionic Bond

E. Hydrophilic-Hydrophobic attraction

13.) Molecules with both hydrophilic and hydrophobic domains are ______.

A. Heterophilic

B. Enantomers

C. Amphipathic

D. Sugars

14.) An Enzyme speeds up an reaction by ______

A. decrease activation energy of a reaction.

B. increase the ΔG of a reaction

C. decrease the Δ G of a reaction

D. increase the activation energy of the reaction

15.) Which of the following structures are characteristic of both eukaryotic and prokaryotic cells?

a. Ribosomes

b. Cytoplasm

c. Nucleus

d. Membranes

e. all of the above

16.) What molecule is the end product of glycolysis?

  1. CO2
  2. H2O
  3. Citric Acid
  4. Acetic Acid
  5. Pyruvic Acid

17.) What cell structure acts as a sorting and packaging center for proteins and lipids synthesized in the endoplasmic reticulum?

  1. Lysosome
  2. Centriole
  3. Golgi
  4. Mitochondrion
  5. Nucleus

18.) What of the following is/ are the product(s) of the citric acid cycle-

a. CO2

b. NAPH and FAPH2

c. ATP

d. H2O

e. all the above

19.) Which of the following statements is incorrect?

a. Glycolysis takes place in the cytoplasm

b. Citric acid cycle takes mitochondrial matrix

c. Glycolysis takes place in the mitochondrial matrix

d. Oxidative phosphorylation takes place in the mitochondrial inner membranes

20.) Which of the following traits does a virus NOT have?

a.)A cell (or) cells

b.)DNA

c.)RNA

d.)Unable to reproduce with out a host

e.)A virus has all of the above traits

Short answer – no short answer on test, but these are some need to know questions

  1. Explain what causes proteins to fold up into a specific 3-D (tertiary structure) shape.
  1. Explain, using diagrams, the sodium-potassium pump.
  1. What is the endomembrane system and what are its components?
  1. Explain how a catalyst works in terms of a reaction energy diagram.
  1. Explain the difference between Competitive inhibitors and Allosteric regulation
  1. What is the input and what are the output products of the Krebs cycle?
  1. Explain the electron transport chain, how it works and what it does.
  1. What is the Fluid Mosaic Model