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AP Biology Photosynthesis — practice questions — page 2

Explore 56 free Photosynthesis questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Photosynthesis questions and exercises with answers

Showing questions 31–56 of 56.

Gas exchange in a leaf occurs through small regulated openings called:Read the answer and worked solution →Each stoma is flanked by cells that open and close it by swelling or shrinking, called:Read the answer and worked solution →Stacked disc-shaped structures inside a chloroplast where chlorophyll is embedded are:Read the answer and worked solution →A stack of thylakoids is called a:Read the answer and worked solution →The liquid-filled space surrounding the grana, where the Calvin cycle occurs, is the:Read the answer and worked solution →The light-dependent reactions take place in the thylakoid membrane and produce:Read the answer and worked solution →Shorter wavelengths of light carry:Read the answer and worked solution →Which colour of visible light has the shortest wavelength and most energy?Read the answer and worked solution →Chlorophyll appears green because green light is:Read the answer and worked solution →Photosystems are numbered by:Read the answer and worked solution →In photosystem II, the electron lost by the reaction center is replaced by splitting:Read the answer and worked solution →The reaction center of photosystem II is called:Read the answer and worked solution →About what share of oxygen made in a leaf is used by its own mitochondria?Read the answer and worked solution →The flow of hydrogen ions through ATP synthase from the thylakoid lumen to the stroma is called:Read the answer and worked solution →The enzyme that catalyses the reaction between carbon dioxide and RuBP is:Read the answer and worked solution →RuBP, the molecule that starts the Calvin cycle, has how many carbon atoms?Read the answer and worked solution →How many turns of the Calvin cycle are needed to produce one three-carbon G3P for export?Read the answer and worked solution →Cacti conserve water by fixing and storing CO2 temporarily at:Read the answer and worked solution →Catch the light reaction partsRead the answer and worked solution →Pop the Calvin cycle playersRead the answer and worked solution →Run through photosynthesisRead the answer and worked solution →Slice the photosynthesis wordsRead the answer and worked solution →Light reactions or Calvin cycleRead the answer and worked solution →Sort pigments, structures and moleculesRead the answer and worked solution →Type the numberRead the answer and worked solution →Photosynthesis bingoRead the answer and worked solution →

Worked practice questions

Gas exchange in a leaf occurs through small regulated openings called:

  1. Lumens
  2. Stroma
  3. Stomata
  4. Grana
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Correct answer: C. Stomata

1. Carbon dioxide enters and oxygen leaves through them. 2. These openings are stomata. 3. Guard cells open and close them. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._

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Each stoma is flanked by cells that open and close it by swelling or shrinking, called:

  1. Mesophyll cells
  2. Root hair cells
  3. Xylem cells
  4. Guard cells
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Correct answer: D. Guard cells

1. They respond to osmotic changes. 2. Guard cells regulate the stomata. 3. On hot dry days they close to save water. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._

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Stacked disc-shaped structures inside a chloroplast where chlorophyll is embedded are:

  1. Thylakoids
  2. Cristae
  3. Ribosomes
  4. Vacuoles
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Correct answer: A. Thylakoids

1. Chloroplasts descend from ancient cyanobacteria. 2. Thylakoid membranes hold chlorophyll. 3. They also hold the electron transport chain. _Source: OpenStax Biology 2e, Chapter 8, Photosynthesis (CC BY 4.0)._

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