Master GCSE Biology

MS1.

- Process by which plants and some other organisms use sunlight to convert carbon dioxide and water into glucose (1)

MS2.

- Higher light intensity increases the rate of photosynthesis (1)

- More light energy is available for the chemical reactions (1)

MS3.

- Chlorophyll is a green pigment (1)

- It traps light energy from sunlight (1)

- It absorbs the blue and red wavelengths of light (1)

- These wavelengths of light are used to excite electrons (1)

MS4.

MS5.

- Anaerobic respiration does not require oxygen (1)

- It produces less energy (1)

- It produces lactic acid or ethanol (1)

MS6.

- Yeast ferment glucose in the absence of oxygen (1)

- This produces ethanol and carbon dioxide (1)

- Ethanol gives alcoholic drinks their intoxicating effect (1)

MS7.

- Lactic acid buildup (1)

MS8.

- The rate of metabolism increases with temperature (1)

- Up to an optimum temperature (1)

- Beyond the optimum temperature, metabolism decreases (1)

MS9.

- Limiting factors restrict plant growth (1)

- Examples include: light intensity, temperature, water availability, nutrients (1)

- If a limiting factor is not provided in sufficient quantity, plant growth will be limited (1)

MS10.

- Desert plants have thick, waxy leaves to reduce water loss (1)

- They have long roots to reach water deep in the ground (1)