Biology MCQs for MDCAT/ MCAT and Test Preparation

201. One of the following is not a limiting factor for enzymes in photosynthesis?

(a) CO2 concentration

(b) Light intensity

(b) Temperature

(d) Pigments

202. One of the following pair of light colors is important for photosynthesis?

(a) Green and yellow

(b) Green and orange

(c) Yellow and orange

(d) Red and blue

203. One of the following may not be required for respiration?

(a) Oxygen

(b) Enzymes

(c) Food molecule

(d) CO2

204. In the structure of ATP, the three phosphate groups are linked to?

(a) Ribose

(b) Adenine

(b) Glucose

(d) H20

205. A car engine uses fuel for work to so. To carry out functions a living cell uses?

(a) Electric power

(b) ATP

(c) Generator

(d) Heat energy

206. Inside a bacterial cell, glycolysis occur in?

(a) Cytoplasm

(b) Nucleoid

(c) Mesosome

(d) Mitochondria

207. During anaerobic respiration, what is/are consumed when pyruvic acid is converted to ethanol? (a) One NADH2

(b) Two NADH2

(c) One NHDH2 and CO2

(d) Only CO2

208. Nitrogen is present in the atmosphere as N2 about?

(a) 70%

(b) 37%

(c) 75%

(d) 78%

209. Minerals, are?

(a) Element

(b) Molecule

(c) Both of these

(d) None of these

210. Carbohydrates are composed of?

(a) Carbone

(b) Hydrogen

(c) Oxygen

(d) all of these