Bioenergetics

Plants make their food by:

• 1 Excretion
• 2 Photosynthesis
• 3 Respiration
• 4 Digestion

Which gas do plants take in for photosynthesis?

• 1 Carbon dioxide
• 2 Oxygen
• 3 Hydrogen
• 4 Nitrogen

Which pigment absorbs light in photosynthesis?

• 1 Haemoglobin
• 2 Keratin
• 3 Chlorophyll
• 4 Melanin

The energy currency of the cell is:

• 1 RNA
• 2 Glucose
• 3 DNA
• 4 ATP

Aerobic respiration needs:

• 1 Only light
• 2 Only nitrogen
• 3 No oxygen
• 4 Oxygen

Anaerobic respiration in yeast produces:

• 1 Oxygen
• 2 Water only
• 3 Lactic acid
• 4 Ethanol and carbon dioxide

Photosynthesis takes place mainly in the:

• 1 Leaves
• 2 Stem bark
• 3 Roots
• 4 Flowers only

The by product of photosynthesis is:

• 1 Water vapour only
• 2 Nitrogen
• 3 Oxygen
• 4 Carbon dioxide

Respiration releases energy from:

• 1 Chlorophyll
• 2 Glucose
• 3 Water
• 4 Light

Which is the correct word equation for photosynthesis?

• 1 Oxygen + water gives glucose
• 2 Carbon dioxide + water gives glucose + oxygen
• 3 Glucose gives oxygen only
• 4 Glucose + oxygen gives carbon dioxide + water