WorksheetsBio 213 Exam 2 Review (8, 9, 10)
Total questions: 40
Worksheet time: 40mins
Which of the following best describes the process of glycolysis in cellular respiration?
It occurs in the mitochondria and produces carbon dioxide.
It occurs in the cytoplasm and breaks down glucose into pyruvate.
It occurs in the chloroplasts and converts light energy into chemical energy.
It occurs in the nucleus and synthesizes DNA.
During photosynthesis, which molecule is produced as a byproduct and released into the atmosphere?
Carbon dioxide
Oxygen
Glucose
Water
Which of the following statements correctly explains the role of enzymes in metabolic reactions?
Enzymes are consumed in the reactions they catalyze.
Enzymes increase the activation energy required for reactions.
Enzymes lower the activation energy, speeding up reactions.
Enzymes are only involved in catabolic reactions.
Identify the correct sequence of stages in the cellular respiration process.
Glycolysis, Krebs cycle, Electron transport chain
Krebs cycle, Glycolysis, Electron transport chain
Electron transport chain, Glycolysis, Krebs cycle
Glycolysis, Electron transport chain, Krebs cycle
Which of the following best describes the Calvin cycle in photosynthesis?
It occurs in the thylakoid membrane and produces ATP.
It occurs in the stroma and synthesizes glucose from carbon dioxide.
It occurs in the mitochondria and breaks down glucose.
It occurs in the cytoplasm and produces pyruvate.
What is the primary role of ATP in cellular metabolism?
To store genetic information
To act as a structural component of cell membranes
To provide energy for cellular processes
To transport oxygen in the blood
Which of the following is an example of a catabolic pathway?
Photosynthesis
Protein synthesis
Glycolysis
DNA replication
In the context of energy transfer in cells, what is the significance of the electron transport chain?
It directly produces glucose from carbon dioxide.
It generates a proton gradient that drives ATP synthesis.
It stores energy in the form of NADPH.
It breaks down fatty acids into acetyl-CoA.
How many ATP molecules result from breaking glucose down into pyruvic acid?
36
zero
six
2
1
Which process does not directly require oxygen?
Cellular respiration
Glycolysis
Fermentation
Photosynthesis
What is the end product of glycolysis?
Glucose
Oxygen
Pyruvate
Carbon dioxide
Breaking down nutrient molecules into smaller molecules and the energy released during this process is referred to as
assimilation
anabolism
catabolism
glycolysis
The Calvin cycle is part of
cell respiration
photosynthesis
glycolysis
end-product inhibition
Which organelle converts radiant energy from the sun's UV rays into chemical energy in a glucose molecule?
chloroplast
mitochondria
nucleus
ribosomes
During photosynthesis, energy is released as -
CO2 and glucose
O2 and glucose
H2O and C6H12O6
H2O and CO2
The initial input of energy in chemical reactions is
Transition site
Activation energy
Entropy
Enthalpy
The first law of thermodynamics states that energy can be –
Created
Destroyed
Lost as heat
All of the above
The energy in a system that is unable to do work—
Enthalpy
Free energy
Kinetic energy
Entropy
Which of the following is an example of kinetic energy?
A sugar molecule in the stomach
A glucose molecule in a leaf
A contracting muscle
A starch molecule in a potato
A reaction with a negative ∆G is –
Exergonic
Entropic
Endergonic
Enthalpic
An endergonic reaction -
Takes in energy
Releases energy
If inhibition is to be competitive, which of the following must be true?
There must be more than one binding site
The reaction must be endergonic
The substate & inhibitor must be similar
The allosteric & active sites must be near each other
Which of the following can influence the rate of reaction when an enzyme is involved? (4)
pH
temperature
substrate concentration
enzyme concentration
reaction vessel
When a molecule can occupy the same active site as the substrate, a situation called __________________ can result
competitive inhibition
allosteric regulation
non-competitive Inhibition
feedback inhibition
What does the letter A represent?
Activation energy
Substrate energy
Product energy
Reaction time
Exergonic reactions release energy and are ___
spontaneous (-ΔG)
non-spontaneous (+ΔG)
spontaneous (+ΔG)
non-spontaneous (-ΔG)
How many FADH2 molecules are produced by 1 turn of the Krebs Cycle?
1
2
3
4
For the two pyruvates that enter from glycolysis, the prep step + Krebs cycles will yield:
1 ATP, 2 NADH, and 1 FADH2
1 ATP, 2 NADH, and 2 FADH2
2 ATP, 8 NADH, and 2 FADH2
The waste product produced during the Krebs cycle is...
oxygen
carbon dioxide
water
ATP
The Krebs cycle is anaerobic.
true
false
Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
fermentation and glycolysis
oxidative phosphorylation and fermentation
oxidation of pyruvate to acetyl CoA and the citric acid cycle
glycolysis and the oxidation of pyruvate to acetyl CoA
Approximately how many molecules of ATP are produced from the complete oxidation of one molecule of glucose (C6H12O6) in aerobic cellular respiration?
30-32
18-24
4
2
Use the image shown to answer the following: If pyruvate oxidation is blocked, what will happen to the levels of oxaloacetate (OAA) and citric acid (citrate) in the citric acid cycle shown in the accompanying figure?
Both oxaloacetate and citric acid will decrease.
Oxaloacetate will decrease and citric acid will accumulate.
Both oxaloacetate and citric acid will accumulate.
Oxaloacetate will accumulate and citric acid will decrease.
What is the main function of the electron transport chain in cellular respiration?
To store energy in the form of NADPH
To produce glucose from carbon dioxide
To generate a proton gradient for ATP synthesis
To break down fatty acids
In photosynthesis, which molecule acts as the primary electron donor?
Glucose
Carbon dioxide
Water
Oxygen
Which molecule acts as the final electron acceptor in the electron transport chain during aerobic respiration?
Carbon dioxide
NADH
Oxygen
Water
What is the primary function of the citric acid cycle in cellular respiration?
To convert carbon dioxide into oxygen
To generate ATP directly
To produce glucose from pyruvate
To oxidize acetyl-CoA and produce NADH and FADH2
