Bio Unit 1: Metabolic Processes
| What happens to electrons in an oxidation reaction?|
a. Electrons are shared equally
b. Electrons are shared but not equally.
c. Electrons are gained.
d. Electrons are lost.
e. Electrons are somestimes shared equally
|d. Electrons are lost in oxidation reactions|
| Which process involves the addition of water to compounds?|
|b. hydrolysis processes involves the addition of water to compounds|
| What kind of isomer are glucose and fructose?|
a. cis-trans isomers
c. optical isomers
d. geometric isomers
e. structural isomers
|e. glucose and fructose are structural isomers|
| How do buffer solutions maintain the pH of blood?|
a. they keep the blood neutral
b. they make the blood more acidic
c. they make the blood more basic
d. they take up or release H+ and OH- ions
e. they lower the pH
|d. buffers take up or release H+ and OH- ions to maintain the pH of blood|
| Which substance is non-polar?|
a. a triglyceride
b. a monosaccharide
c. an amino acid
d. a sugar
e. none of the above
|a. triglycerides are non-polar|
| Classify the following reaction|
acetic acid + sodium hydroxide = sodium acetate + water
|e. neutralization reactions take acetic acie and sodium hydroxide to make sodium acetate and water|
| Which statement about polar molecules is correct?|
a. They are either positively or negatively charged.
b. They have a partial positive and a partial negative charge.
c. They have no charge.
d. They cant exist because molecules cant be polar.
e. They are neutral.
|b. Polar molecules have a partial positive and a partial negative charge.|
| Which kind of energy is stored in foods?|
|e. chemical energy is stored in food|
|Which statement about enzymes is not correct?|
a. Enzymes speed up the rate of chemical reactions.
b. Enzymes are not consumed during chemical reactions.
c. Enzymes lower the activation energy need for chemical reactions.
d. Enzymes increase the energy of chemical reactions
e. Enzymes are substrate specific.
|d. Enzymes do not increase the energy of chemical reactions.|
| Which reaction is endothermic?|
a. protein synthesis
b. cellular respiration
c. breakdown of ATP molecules
d. oxidation of glucose
|a. protein synthesis is an endothermic reaction|
|If three human digestive enzymes have pH peakin at 2, 4, and 6 what are the enzmes in order.||Pepsin, Trypsin, Amylase|
| In order to proceed, a chemical reaction obtains energy from another chemical reation that proceeds at the same time. What term describes how these two reactionss are related?|
| e. coupled reactions obtain energy from one another|
(an exothermic reaction drives an endothermic reaction)
| Which term can be defined at the tendency for disorder to inrease in a system>|
d. free energy
|a. entropy is the tendency for disorder to inrease in a system|
| If an enzyme is subected to high temperatures or strong acids or bases, it will undero a structural change that will render it nonfunctional. What is this process called?|
|c. denaturation is when the enzyme is rendered non- functional|
| What kind of force holds a substrate in the active site of an enzyme|
a. strong covalent bonds
b. multiple weak bonds
c. ionic bonds
d. allosteric bonds
e. non polar covalent bonds
|b. multiple weak bonds hold the subtrate in the active site of an enzyme|
| Name the chemical reaction that splits ATP into ADP and Pi|
|e. hydrolysis reactions split ATP into ADP and Pi|
| In aerobic, respiration, what is the the final electron acceptor in the electron transport chain? |
c. hydrogen ions
|d. water is the final electron acceptor in the electron transport chain|
| Where does glycolysis occur|
a. in the mitochondria
b. in the cytosol of cells
c. inside the nucleus
d. in the organelles
e. in the cristae
|b. glycolysis occurs in the cytosol of cells|
| Which cell organelle is not a site of ATP production?|
e. cell membrane
|a. the nucleus is not a site of ATP production|
| Which product is formed by an exothermic reaction?|
|b. ADP is formed by an exothermic reaction|
| In glycolysis 1, _ molecules of ATP are used. In glycolysis 2, _ molecules of ATP are produced.|
e. 2, 16
|a. 2 molecules of ATP are produced in glycolysis 1, 4 molecules of ATP produced in glycolysis 2.|
| In glycolysis, the net production of ATP is _ ATP. In the Krebs cycle, it is _ ATP, and in the electron transport chain, it is _ ATP. Thus, a total of _ ATP are produced during cellular respiration. |
a. 2,4, 16, 32
b. 4, 4, 30, 36
c. 2, 2, 32, 26
d. 4, 2, 32, 38
e. 4, 8, 16, 32
|In glycolysism the net production of ATP is 2 ATP. In the Kreb's cycle, it is 2 ATP, and in the electron transport, it is 32 ATP. Thus, a total of 26 ATP are produced during cellular respiration.|
| Which statment about photosynthesis is correct?|
a. the synthesis reaction occurs in the stroma.
b. the synthesis reaction occurs in the thylakoid membrane
c. the photo reactions occur in the stroma
d. the photo reactions occur in the matrix
e. the synthesis reactions occur in the matrix
|a. the synthesis reaction occurs in the stroma.|