Question

biology exam 3

1. what is the equation for the process shown above? (hint: two reactants and two products)

a. $h_2o + o_2 \to co_2 + c_6h_{12}o_6$
b. $c_6h_{12}o_6 + co_2 \to h_2o + co_2$
c. $c_6h_{12}o_6 + h_2o \to co_2 + o_2$
d. $h_2o + co_2 \to o_2 + c_6h_{12}o_6$

1. what is the structure in the figure in which an electron transport chain is located?

a. chlorophyll
b. plasma membrane
c. thylakoid membrane
d. nuclear envelope

1. what is the name of the cycle represented by a circle in the diagram above and what happens in that cycle?

a. the calvin cycle uses carbon dioxide from the atmosphere and the chemical energy of atp to produce three - carbon sugars.
b. glycolysis breaks down glucose molecules within the cytoplasm of a cell to form pyruvate molecules.
c. the krebs cycle releases stored energy through the oxidation of acetyl - coa derived from carbohydrates, fats, and proteins.
d. the calvin cycle uses oxygen from the atmosphere and the chemical energy of adp to produce atp and nadph.

1. which process would bacteria living near a heat vent on the ocean floor use to build carbon - based molecules, such as sugars?

a. light - independent reactions
b. cellular respiration
c. fermentation
d. chemosynthesis

1. what is the name of the process that breaks glucose down into the pyruvate that is used in cellular respiration?

a. fermentation
b. photosynthesis
c. glycolysis
d. the krebs cycle

1. the aerobic stages of cellular respiration take place in the...

a. plasma membrane
b. mitochondria
c. cytoplasm
d. grana

Explanation:

1. Photosynthesis uses \(H_2O\) and \(CO_2\) as reactants and produces \(O_2\) and \(C_6H_{12}O_6\). Option d (\(H_2O+CO_2

ightarrow O_2 + C_6H_{12}O_6\)) is correct.

1. The electron - transport chain in photosynthesis is located in the thylakoid membrane. Option c is correct.
2. The Calvin Cycle uses \(CO_2\) from the atmosphere and ATP energy to produce three - carbon sugars. Option a is correct.
3. Bacteria near ocean - floor heat vents use chemosynthesis (which does not rely on light) to build carbon - based molecules. Option d is correct.
4. Glycolysis breaks glucose down into pyruvate for cellular respiration. Option c is correct.
5. The aerobic stages (Krebs cycle and electron - transport chain) of cellular respiration occur in the mitochondria. Option b is correct.

Answer:

1. d. \(H_2O + CO_2

ightarrow O_2+C_6H_{12}O_6\)

1. c. Thylakoid membrane
2. a. The Calvin Cycle uses carbon dioxide from the atmosphere and the chemical energy of ATP to produce three - carbon sugars.
3. d. Chemosynthesis
4. c. Glycolysis
5. b. Mitochondria