| What to create | Exam |
| Which subject | Biology |
| What age group | Year or Grade 11 |
| What topic | Enzymes and Biochemical ReactionsAdenosine Energy Flow through Photosynthesis |
| Question types | Close-ended |
| Number of questions | 30 |
| Number of answers | 4 |
| Correct answers | 1 or more |
| Show correct answers | |
| Use images (descriptions) | |
| Any other preferences |
What is the primary function of enzymes in biochemical reactions?
A. To provide energy
B. To act as catalysts
C. To form chemical bonds
D. To increase activation energy
What role do chlorophyll molecules play in photosynthesis?
A. They absorb sunlight
B. They release oxygen
C. They convert sunlight into chemical energy
D. They facilitate enzyme reactions
What compound is produced during the light-dependent reactions of photosynthesis?
A. Glucose
B. Oxygen
C. Carbon Dioxide
D. ATP
Which of the following statements about ATP (Adenosine Triphosphate) is correct?
A. ATP is a coenzyme
B. ATP stores energy in its phosphate bonds
C. ATP is produced only during dark reactions
D. ATP can be used to power cell activities
What is the significance of the Calvin Cycle in photosynthesis?
A. It generates glucose
B. It captures light energy
C. It splits water molecules
D. It produces ATP and NADPH
Which of the following factors can affect enzyme activity?
A. Temperature
B. pH Levels
C. Substrate Concentration
D. Light Intensity
Which enzyme is responsible for catalyzing the conversion of carbon dioxide and ribulose bisphosphate (RuBP) in the Calvin cycle?
A. ATP synthase
B. RuBisCO
C. Phosphorylase
D. Lactate dehydrogenase
What is the ultimate source of energy for photosynthesis?
A. Water
B. Sunlight
C. Carbon Dioxide
D. Glucose
In which part of the chloroplast do the light-dependent reactions occur?
A. Stroma
B. Thylakoid membranes
C. Matrix
D. Cytoplasm
Which product is NOT part of the light-dependent reactions of photosynthesis?
A. NADPH
B. ATP
C. Glucose
D. Oxygen
What is the role of NADPH in photosynthesis?
A. To store energy
B. To act as a reducing agent
C. To transport oxygen
D. To capture light energy
Which process is directly driven by the flow of protons (H+) across the thylakoid membrane?
A. Photolysis
B. ATP Synthesis
C. Calvin Cycle
D. Fermentation
What does the term "substrate" refer to in enzymatic reactions?
A. The enzyme itself
B. The products of the reaction
C. The reactant that an enzyme acts upon
D. The energy released in the reaction
What product is formed during the photolysis of water in photosynthesis?
A. Hydrogen
B. Glucose
C. Carbon Dioxide
D. ATP
Which part of the plant is primarily responsible for gas exchange?
A. Roots
B. Stem
C. Flowers
D. Stomata
How do temperature and pH affect enzyme activity?
A. They have no effect
B. They can lead to denaturation
C. They only affect substrate concentration
D. They improve enzyme stability
What is the inhibiting effect of competitive inhibitors on enzyme function?
A. They enhance enzyme activity
B. They bind to the active site, preventing substrate binding
C. They increase product formation
D. They change the enzyme's structure
Which gas is consumed during photosynthesis?
A. Oxygen
B. Nitrogen
C. Carbon Dioxide
D. Helium
Which molecule acts as the main energy currency in cells?
A. NADPH
B. ATP
C. FADH2
D. ADP
What happens to an enzyme after it catalyzes a reaction?
A. It becomes inactive
B. It is consumed in the reaction
C. It can be reused
D. It changes permanently
The reaction of photosynthesis can be summarized by the equation:
A. CO2 + H2O → O2 + glucose
B. O2 + glucose → CO2 + H2O
C. CO2 + glucose → O2 + H2O
D. H2O + O2 → glucose + energy
What is the role of the thylakoid membranes in photosynthesis?
A. Site of glucose formation
B. Storage of chlorophyll
C. Location for light-dependent reactions
D. Synthesis of carbon dioxide
In the absence of sunlight, which process do plants rely on for energy?
A. Photosynthesis
B. Respiration
C. Fermentation
D. Transpiration
What is the importance of water in photosynthesis?
A. It provides oxygen
B. It acts as a solvent
C. It is used in the Calvin cycle
D. It serves as an electron donor
What does the term "feedback inhibition" mean regarding enzyme activity?
A. Enzyme activity is enhanced
B. A product of a reaction inhibits the enzyme's activity
C. Enzyme activity is always constant
D. Substrates cannot bind to the enzyme
Which two processes are involved in energy flow within a plant?
A. Photosynthesis and respiration
B. Photosynthesis and fermentation
C. Cellular respiration and glycolysis
D. Transpiration and photosynthesis
Which enzyme is known for splitting ATP to release energy?
A. Phosphorylase
B. ATPase
C. Lipase
D. Amylase
Where do the carbon atoms in glucose originate during photosynthesis?
A. From water molecules
B. From the air as carbon dioxide
C. From the soil
D. From glucose
What is produced in anaerobic conditions instead of ATP?
A. Glucose
B. Lactic acid or ethanol
C. CO2
D. Oxygen
How do light intensity levels affect the rate of photosynthesis?
A. Direct correlation until a saturation point
B. No effect at all
C. Inversely related
D. Completely dependent on temperature