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WorksheetsCell Membranes and Metabolism Quiz
Total questions: 23
Worksheet time: 12mins
What does the term "selective permeability" mean in the context of a cell membrane?
The membrane allows all molecules to pass through freely.
The membrane selectively allows certain molecules to pass while blocking others.
The membrane allows no molecules to pass through.
The membrane only allows large molecules to pass.
Which type of molecules can freely pass through the cell membrane?
Large polar molecules
Ions
Small nonpolar molecules
Large charged molecules
Which of the following best describes diffusion?
The movement of water through a semi-permeable membrane.
The movement of particles from an area of lower concentration to higher concentration.
The movement of molecules from an area of higher concentration to lower concentration.
The movement of large molecules via vesicles.
What happens to a human blood cell when placed in a hypertonic solution?
The cell swells and bursts.
The cell shrinks as water moves out.
The cell remains the same size.
The cell absorbs water and expands.
What happens to a human blood cell when placed in a hypotonic solution?
The cell swells and may burst.
The cell shrinks.
The cell stays the same size.
The cell expels water and shrinks.
Which of the following statements is true about facilitated diffusion?
It requires energy in the form of ATP.
It involves the use of transport proteins to move molecules across the membrane.
It moves molecules against their concentration gradient.
It involves water moving across the membrane.
What is the primary function of osmosis?
To move oxygen across the cell membrane.
To move water across the cell membrane.
To transport large proteins into the cell.
To produce ATP from glucose.
Which process involves the movement of molecules from an area of higher pressure to lower pressure across a membrane?
Diffusion
Facilitated diffusion
Osmosis
Filtration
What does the term "cellular metabolism" refer to?
The breakdown of glucose for energy production.
The total of all chemical reactions occurring in the cell.
The synthesis of proteins from amino acids.
The conversion of energy from food into mechanical energy.
Which of the following best describes catabolism?
The building of larger molecules from smaller ones.
The breakdown of larger molecules into smaller ones.
The production of glucose from carbon dioxide and water.
The formation of ATP molecules.
What is the function of an enzyme?
To act as a substrate in metabolic reactions.
To lower the activation energy required for a chemical reaction to occur.
To increase the activation energy for reactions.
To store energy in the cell.
What does the term "activation energy" mean in relation to enzymes?
The energy required to break down an enzyme.
The energy needed to start a chemical reaction.
The energy released by the enzyme during reactions.
The energy needed to produce ATP.
Which of the following is true about the enzyme-substrate complex?
The substrate binds to the enzyme at the active site, forming the complex.
The enzyme is destroyed during the reaction.
The enzyme releases energy during the reaction.
The complex only forms in the absence of coenzymes.
How do cofactors and coenzymes affect enzyme function?
They act as inhibitors to slow down enzyme activity.
They are not necessary for enzyme function.
They assist enzymes in carrying out chemical reactions.
They destroy enzymes after the reaction.
What is feedback inhibition in metabolic pathways?
When an enzyme is constantly active.
When the product of a pathway inhibits the pathway's first enzyme to prevent overproduction.
When an enzyme binds to the substrate to increase reaction rate.
When an enzyme breaks down waste products of metabolism.
Where is energy stored in molecules, and how is it released?
Energy is stored in the bonds between atoms, and released when these bonds are broken.
Energy is stored in the cytoplasm and released in the form of heat.
Energy is stored in the nucleus and released when RNA is transcribed.
Energy is stored in glucose molecules and released through cellular respiration.
How does ATP store and release energy?
ATP stores energy in its phosphate bonds and releases it when these bonds are broken.
ATP stores energy in its glucose molecule and releases it when broken down.
ATP stores energy in its nitrogen base and releases it when it bonds with oxygen.
ATP releases energy when it is synthesized in the mitochondria.
Which of the following is true regarding ATP recycling?
ATP is consumed and never recycled.
ATP is broken down to ADP, and the energy released is used to form new ATP molecules.
ATP is formed in the cytoplasm and stored in the nucleus.
ATP does not play a role in cellular processes after its synthesis.
What is the main function of cellular respiration?
To convert sunlight into chemical energy.
To break down glucose into carbon dioxide and water and release energy.
To synthesize proteins.
To produce oxygen for cellular processes.
Which of the following occurs during glycolysis?
Glucose is broken down into two molecules of pyruvate, producing ATP and NADH.
Oxygen is consumed to produce carbon dioxide and water.
ATP is generated from fatty acids.
Oxygen is used to convert glucose into lactic acid.
What happens during the citric acid cycle (Krebs cycle)?
Glucose is broken down into two molecules of pyruvate.
NADH and FADH2 are produced, and CO2 is released.
Oxygen is consumed and ATP is produced.
Oxygen is released and glucose is converted into pyruvate.
What is the function of the electron transport chain in cellular respiration?
To break down glucose into pyruvate.
To transfer electrons from NADH and FADH2 to oxygen, forming water and generating ATP.
To synthesize glucose from carbon dioxide and water.
To transport oxygen into the mitochondria.
How much total ATP is generated at the end of cellular respiration?
2 ATP
18 ATP
36-38 ATP
100 ATP
