MCQOPTIONS
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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 2201. |
Oxidation of a molecule of acetyl CoA produces (RPMT. 1990) |
| A. | 12 ATP |
| B. | 15 ATP |
| C. | 6 ATP |
| D. | 19 ATP |
| Answer» B. 15 ATP | |
| 2202. |
Which is wrong about cytochrome P-450 ? (C.B.S.E. 1998) |
| A. | Contains iron |
| B. | Is a coloured cell |
| C. | Is an enzyme |
| D. | Plays an important role in metabolism. |
| Answer» C. Is an enzyme | |
| 2203. |
Krebs cycle is (AMU. 1993) |
| A. | Oxidation of glucose to alcohol and water |
| B. | Oxidation of acetyl CoA to carbon dioxide and water involving electron transport |
| C. | Complete oxidation of acetyl CoA without electron transport |
| D. | Complete reduction of acetyl CoA to carbon dioxide and water. |
| Answer» D. Complete reduction of acetyl CoA to carbon dioxide and water. | |
| 2204. |
Electron transport system of mitochondria is located in (M.P.PMT. 1997, CPMT. 1999, R.PMT.2000) |
| A. | Outer membrane |
| B. | Inner membrane |
| C. | Inter-cristal space |
| D. | Outer chamber. |
| Answer» C. Inter-cristal space | |
| 2205. |
Maximum amount of energy/ATP is liberated on oxidation of (AFMC 1984, 1988; CPMT. 1988; CB.S.E. 1994; AMU 1996) |
| A. | Fat |
| B. | Proteins |
| C. | Starch |
| D. | Vitamins |
| Answer» B. Proteins | |
| 2206. |
Terminal cytochrome of respiratory chain which donates electrons to oxygen is (CPMT 1989; CBSE, 1992) |
| A. | Cyt b |
| B. | Cyt c |
| C. | Cyt a |
| D. | Cyt a3 |
| Answer» E. | |
| 2207. |
End product of citric add/Krebs cycle is (CBSE. 1993; Har. P.M.T. 1994) |
| A. | Citric acid |
| B. | Lactic acid |
| C. | Pyruvic acid |
| D. | CO2 + H2O |
| Answer» E. | |
| 2208. |
RQ of protein rich pulses is ‘ (RPMT. 1989) |
| A. | Unity |
| B. | Infinity |
| C. | More than unity |
| D. | Less than one |
| Answer» E. | |
| 2209. |
In Opunita and other succulents, night time R.Q. is (CPMT, 1986) |
| A. | One |
| B. | More than one |
| C. | Zero |
| D. | Less than one |
| Answer» D. Less than one | |
| 2210. |
Oxygen is reduced to water in (Kerala 2000,2006) |
| A. | Fermentation |
| B. | Calvin cycle |
| C. | Electron transport |
| D. | Krebs cycle |
| Answer» D. Krebs cycle | |
| 2211. |
Cytochrome is (C.B.S.E. 2001) |
| A. | Metalloflavoprotein |
| B. | Fe-containing porphyrin pigment |
| C. | Lipid |
| D. | Glycoprotein |
| Answer» C. Lipid | |
| 2212. |
RQ of anaerobic respiration is (Wardha2005) |
| A. | < 1 |
| B. | 0 |
| C. | 1 |
| D. | >1 |
| Answer» C. 1 | |
| 2213. |
Which is the product of aerobic respiration? (A.F.M.C 1995) |
| A. | Malic acid |
| B. | Ethyl alcohol |
| C. | Lactic acid |
| D. | Pyruvic acid |
| Answer» B. Ethyl alcohol | |
| 2214. |
In bacteria the site for respiration is (CB.S.E. 1997) |
| A. | Cytoplasm |
| B. | Mesosome |
| C. | Episome |
| D. | Plasmid |
| Answer» C. Episome | |
| 2215. |
In glycolysis, enzyme enolasc produces (AM.U. 1999) |
| A. | Phosphoglyceric acid |
| B. | Phosphoenol pyruvate |
| C. | Phosphoglyceraldehyde |
| D. | Pyruvate |
| Answer» C. Phosphoglyceraldehyde | |
| 2216. |
Production of alcohol by Yeast fermentation is ....... process (Pb. P.M.T. 1998) |
| A. | Anaerobic |
| B. | Aerobic |
| C. | Light dependent |
| D. | Both A and C. |
| Answer» B. Aerobic | |
| 2217. |
R.Q. is maximum when respiratory substrate is (MPPMT. 1992; A.U.M.S. 1992) |
| A. | Glucose |
| B. | Fat |
| C. | Protein |
| D. | Malic acid. |
| Answer» E. | |
| 2218. |
Which of the following is the first step of glycolysis (C.P.M.T. 2004) |
| A. | Conversion of glucose to fructose |
| B. | Dehydrogenation of glucose |
| C. | Breakdown of glucose |
| D. | Phosphorylation of glucose |
| Answer» E. | |
| 2219. |
Products of anaerobic respiration are (J.I.P.M.E.R. 2005) |
| A. | Water and alcohol |
| B. | Water and oxygen |
| C. | Alcohol and CO2 |
| D. | CO2 and water |
| Answer» D. CO2 and water | |
| 2220. |
Single turn of citric acid cycle yields (Kerala2005) |
| A. | 2 FADH2, 2 NADH2, 2 ATP |
| B. | 1 FADH2, 2 NADH2, 1 ATP |
| C. | 1 FADH2, 4 NADH2, 1 ATP |
| D. | 1 FADH2, 1 NADH2, 1 ATP |
| Answer» D. 1 FADH2, 1 NADH2, 1 ATP | |
| 2221. |
How many ATP molecules are released when one molecule of glucose is oxidised in our liver cells(CP.M.t:2’ob5) |
| A. | 36 |
| B. | 38 |
| C. | 2 |
| D. | 8 |
| Answer» C. 2 | |
| 2222. |
Which one is an important intermediate formed in all types of respiration (Wardha2005) |
| A. | Acetyl CoA |
| B. | Oxaloacetate |
| C. | Pyruvic acid |
| D. | Tricarboxylic acid |
| Answer» D. Tricarboxylic acid | |
| 2223. |
In respiration (Manipal 2002) |
| A. | 2 PGAL are formed in glycolysis and none in Krebs cycle |
| B. | 6 PGAL in glycolysis, 3 PGAL in Krebs cycle |
| C. | 8 PGAL in glycolysis, 3 PGAL in Krebs cycle |
| D. | PGAL formation does not occur in respiration. |
| Answer» B. 6 PGAL in glycolysis, 3 PGAL in Krebs cycle | |
| 2224. |
Identify the compound that links glycolysis and Krebs cycle (Karnataka 2005) |
| A. | Oxaloacctate |
| B. | Pyruvic acid |
| C. | Lactic acid |
| D. | Acetyl CoA |
| Answer» E. | |
| 2225. |
Which one requires oxygen (AMU. 2003) |
| A. | Fermentation |
| B. | EMP pathway |
| C. | Pentose phosphate pathway |
| D. | None of the above |
| Answer» E. | |
| 2226. |
How many molecules of NADH2 are produced when four molecules of phosphogyceraldehyde arc converted into four molecules of pyruvate (Guj.CET. 2006) |
| A. | 8 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» D. 6 | |
| 2227. |
The overall goal of glycolysis, Krebs cycle and electron transport system is the formation of (C.B.S.E. 2007) |
| A. | ATP in one large oxidation reaction |
| B. | Sugars |
| C. | Nucleic acid |
| D. | ATP in small steps |
| Answer» E. | |
| 2228. |
Mechanism of aerobic respiration was discovered by (A.F.M.C. 2004) |
| A. | Calvin |
| B. | Krebs |
| C. | Pasteur |
| D. | Hatch and Slack |
| Answer» C. Pasteur | |
| 2229. |
Muscle cells starved of oxygen and supplied with pyruvic acid will produce (M.H. 2005) |
| A. | Ethanol |
| B. | Lactic acids |
| C. | CO2 only |
| D. | CO2 and H2O |
| Answer» C. CO2 only | |
| 2230. |
Glycolysis takes place in (A.F.M.C 2003) |
| A. | All cell |
| B. | Only eukaryotic cells |
| C. | Muscle cells |
| D. | Nerve cells |
| Answer» B. Only eukaryotic cells | |
| 2231. |
Enzyme used in conversion of glucose to glucose 6-phosphate is (J.I.PME.R. 2005) |
| A. | Hexokinase |
| B. | Isomerase |
| C. | Phosphokinase |
| D. | Phosphohexokinase |
| Answer» B. Isomerase | |
| 2232. |
What is RQ of the reaction 2C51H98O6 + 145O2 –– 102CO2 + 98H2O. (Manipal 2005) |
| A. | 0.7 |
| B. | l.0 |
| C. | l.45 |
| D. | l.62 |
| Answer» B. l.0 | |
| 2233. |
During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP (C.B.S.E. 2005) |
| A. | Glycolysi |
| B. | Krebs cycle |
| C. | Conversion of pyruvic acid to acetyl CoA |
| D. | Electron transport chain. |
| Answer» E. | |
| 2234. |
RQ is less than one, if the respiratory substrate is (Manipal 2005) |
| A. | Organic acid |
| B. | Fats and proteins |
| C. | Sucrose |
| D. | Glucose |
| Answer» C. Sucrose | |
| 2235. |
Which phase of life cycle is dominant in the individuals of angiosperms ? |
| A. | Gametophyte |
| B. | Growth phase |
| C. | Sporophyte |
| D. | Development phase |
| Answer» D. Development phase | |
| 2236. |
Which is rich in energy (CE.T. Chd.2003) |
| A. | NAD+ |
| B. | Mitochondria |
| C. | FAD |
| D. | ATP |
| Answer» E. | |
| 2237. |
The formation of zygote without the act of syngamy is called |
| A. | Poly embryon |
| B. | Parthenogenesis |
| C. | Budding |
| D. | Apospory |
| Answer» C. Budding | |
| 2238. |
F0 base of oxysome is towards : (M.H. 2005) |
| A. | Outer chamber |
| B. | Matrix |
| C. | Inner chamber |
| D. | Both B and C |
| Answer» B. Matrix | |
| 2239. |
The process by which seedless fruits are produced are known as |
| A. | Parthenocarpy |
| B. | Apogamy |
| C. | Parthenogenesis |
| D. | Apospory |
| Answer» B. Apogamy | |
| 2240. |
A flower is specially formed for |
| A. | decoration |
| B. | photosynthesis |
| C. | reproduction |
| D. | fragrance |
| Answer» D. fragrance | |
| 2241. |
When a molecule of pyruvic acid is subjected to anaerobic oxidation and forms lactic acid, there is(RPMT. 1985 BHU. 1985) |
| A. | Loss of 3 ATP molecule |
| B. | Loss of 6 ATP molecules |
| C. | Gain of 2 ATP molecules |
| D. | Gain of 4 ATP molecules |
| Answer» B. Loss of 6 ATP molecules | |
| 2242. |
A flower is |
| A. | Modified stem |
| B. | Modified leaf |
| C. | Modified branch |
| D. | Modified shoot |
| Answer» E. | |
| 2243. |
Instantaneous source of energy is {A.F.M.C. 1983) |
| A. | Glucose |
| B. | Fats |
| C. | Proteins |
| D. | Amino acid. |
| Answer» B. Fats | |
| 2244. |
NADP+ is reduced to NADPH in (C.B.S.E. 1988) |
| A. | HMP |
| B. | Calvin Cycle |
| C. | Glycolysis |
| D. | EMP |
| Answer» B. Calvin Cycle | |
| 2245. |
Incomplete breakdown of sugars in anaerobic respiration forms(CPM.T. 1984,1988; M.P.P.M.T. 1987,1989) |
| A. | Fructose and water |
| B. | Glucose and CO2 |
| C. | Alcohol and CO2 |
| D. | Water and CO2 |
| Answer» D. Water and CO2 | |
| 2246. |
ATP equivalents produced during oxidation of succinate to fumarate for one glucose molecule is/are(R.PMT.1988) |
| A. | l |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 2247. |
Raw material of respiration is (R.R.M.T. 199) |
| A. | Glucose and fructose |
| B. | Glucose and sucrose |
| C. | Glucose + O2 |
| D. | Glucose + CO2 |
| Answer» D. Glucose + CO2 | |
| 2248. |
Which of the following is the source of respiration ? (C.P.M.T. 1979) |
| A. | RNA |
| B. | DNA |
| C. | ATP |
| D. | Stored food |
| Answer» E. | |
| 2249. |
RQ for glucose carbohydrate is (D.PM.T. 1985, Bih. PMT. 1990, RPMT. 1996, Wardha2001) |
| A. | 1 |
| B. | 0.5 |
| C. | 2 |
| D. | 0.05 |
| Answer» B. 0.5 | |
| 2250. |
An indispensable role in energy metabolism is played by (D.PM.T. 1986) |
| A. | Sodium |
| B. | Phosphorus |
| C. | Calcium |
| D. | Lithium |
| Answer» C. Calcium | |