WEEK 9 (Chapter 3-8) SB025

Where does the Calvin cycle occur in C₃ plants?

• Thylakoid membrane

• Cytoplasm

• Stroma of chloroplast (mesophyll cell)

• Matrix of mitochondria

Which of the following are products of the light-dependent reaction required for glucose synthesis in the Calvin cycle?

• 18 ATP, 12 NADPH

• 12 ATP, 18 NADPH

• 6 ATP, 6 NADPH

• 36 ATP, 24 NADPH

Why does the concentration of 3-phosphoglycerate increase during the light-independent reaction?

• RuBP binds with CO₂

• Carbon fixation occurs

• Oxygen is used instead of CO₂

• The Calvin cycle stops completely

Why can’t the Calvin cycle occur in the absence of light?

• Light-dependent reactions do not occur

• No ATP and NADPH are produced

• CO₂ cannot enter the leaf

• Glucose is directly produced in the light-dependent stage

When there is no light, glucose concentration will ______________.

• increase

• decrease

The first stable product formed in the Calvin cycle is ______________.

The ________________ valve prevents backflow of blood from the right ventricle to the right atrium.

Which label is representing the Bundle of His?

• A

• C

• D

• E

The contraction of the atria is controlled by the:

• SA node

• AV node

• Purkinje fibres

• Bundle of His

#2 is pointing to the:

• SA node

• AV node

• AV bundle branches

• Purkinje fibers

Tags

NGSS.HS-LS1-3