Question

during a biology class, anika and benjamin discuss energy conversion in mitochondria. which best explains the process?
a) water and light energy allow anaerobic respiration.
b) energy in glucose bonds transfers to atp phosphate bonds.
c) oxygen directly converts into glucose.
d) atp is broken down to form glucose.

during exercise, which gas do humans inhale for energy production and exhale as waste?
a) oxygen in, carbon dioxide out
b) oxygen in, nitrogen out
c) carbon dioxide in, oxygen out
d) nitrogen in, oxygen out

Explanation:

First Question (Energy Conversion in Mitochondria)

• Option A: Anaerobic respiration doesn't need light or water, and mitochondria are for aerobic respiration, so A is wrong.
• Option B: Mitochondria do cellular respiration. Glucose is broken down, and its energy is used to make ATP (by adding phosphate to ADP, transferring energy to ATP's phosphate bonds). This matches mitochondrial energy conversion.
• Option C: Oxygen is for respiration, not converting to glucose. Glucose is made in photosynthesis (chloroplasts), so C is wrong.
• Option D: ATP is made from glucose breakdown, not broken down to make glucose. So D is wrong.

Second Question (Gas Exchange During Exercise)

• Humans do aerobic respiration for energy. We inhale \(O_2\) (oxygen) which is used in breaking down glucose. The waste product is \(CO_2\) (carbon dioxide), which we exhale.
• Option B: Nitrogen isn't involved in energy production or exhaled as waste from respiration.
• Option C: We exhale \(CO_2\) and inhale \(O_2\), not the other way around.
• Option D: Nitrogen isn't used for energy, and we don't exhale oxygen as waste (we use oxygen in respiration).

Answer:

B) Energy in glucose bonds transfers to ATP phosphate bonds.