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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.
| 2101. |
Number of direct ATPs produced in glycolysis is (Gujarat GET Q.B.) |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 1 |
| Answer» C. 6 | |
| 2102. |
Krebs cycle occurs in (Gujarat GET Q.B.) |
| A. | Cytoplasmic matrix |
| B. | Mitochondrial matrix |
| C. | F1 particles |
| D. | All these |
| Answer» C. F1 particles | |
| 2103. |
Number of NADH + H+, formed in one turn of Krebs cycle is |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 5 |
| Answer» C. 6 | |
| 2104. |
Lactic acid is formed due to the reduction of (Gujarat GET Q.B.) |
| A. | Pyruvic acid |
| B. | Acetaldehyde |
| C. | Malic acid |
| D. | Acetyl CoA |
| Answer» B. Acetaldehyde | |
| 2105. |
In respiration, the oxygen is used in |
| A. | Glycolysi |
| B. | Krebs cycle |
| C. | ETS |
| D. | Fermentation |
| Answer» D. Fermentation | |
| 2106. |
The location of ETS is ; |
| A. | Mitochondria! matrix |
| B. | Cytoplasm |
| C. | Outer mitochondrial membranes |
| D. | Inner mitochondrial membrane |
| Answer» E. | |
| 2107. |
Formation of ATP occurs |
| A. | In outer mitochondrial membrane |
| B. | On F1 particles |
| C. | Mitochondrial matrix |
| D. | In mitochondrial DNA |
| Answer» C. Mitochondrial matrix | |
| 2108. |
Direct synthesis of ATPs in one turn of Krebs cycle is |
| A. | l |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 2109. |
One molecules of NADH+ H + gives how many ATPs in ETS (Gujarat CETQ.B.) |
| A. | 2 ATP |
| B. | 3 ATP |
| C. | 4 ATP |
| D. | 6 ATP |
| Answer» C. 4 ATP | |
| 2110. |
Number of ATPs which can be generated by one FADH2 in ETS are (Gujarat GET Q.B.) |
| A. | l |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 2111. |
Conversion of pyruvic acid to acetyl Co A is called |
| A. | Glycolysi |
| B. | Fermentation |
| C. | ETS |
| D. | Oxidative decarboxylation |
| Answer» E. | |
| 2112. |
Number of FADH2 formed in one turn of Krebs cycle is |
| A. | l |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 2113. |
- keto glutaric acid consists of |
| A. | 3 carbon |
| B. | 4 carbons |
| C. | 5 carbons |
| D. | 6 carbons |
| Answer» D. 6 carbons | |
| 2114. |
Krebs cycle is also known as |
| A. | Citric acid cycle |
| B. | TCA cycle |
| C. | Both a and b |
| D. | Calvin cycle |
| Answer» D. Calvin cycle | |
| 2115. |
Reduction of acetaldehyde gives |
| A. | Methyl alcohol |
| B. | Ethyl alcohol |
| C. | Glycerol |
| D. | All these |
| Answer» C. Glycerol | |
| 2116. |
Citric acid cycle was proposed by |
| A. | Kreb |
| B. | Calvin |
| C. | Mendel |
| D. | Lavosier |
| Answer» B. Calvin | |
| 2117. |
Number of reduced coenzymes NADH produced during glycolysis are |
| A. | 1 |
| B. | 2 |
| C. | 4 |
| D. | 6 |
| Answer» C. 4 | |
| 2118. |
The process occurring during Kreb’s cycle is |
| A. | Decarboxylation and dehydrogenation |
| B. | Decarboxylation, dehydrogenation and phosphorylation |
| C. | Decarboxylation and phosphorylation |
| D. | Dehydrogenation and phosphorylation |
| Answer» C. Decarboxylation and phosphorylation | |
| 2119. |
Fermentation is the primary mode of energy production in |
| A. | Higher plant |
| B. | Animals |
| C. | Yeast |
| D. | Algae. |
| Answer» D. Algae. | |
| 2120. |
During glycolysis water is released from |
| A. | 2, Phospoglyceric acid |
| B. | Biphosphoglyceric acid |
| C. | Phosphoenol pyruvic acid |
| D. | Phosphoglyceraldehyde |
| Answer» B. Biphosphoglyceric acid | |
| 2121. |
The site of occurrance of all reactions of PPP is |
| A. | Cytosol |
| B. | Mitochondrial matrix |
| C. | Cristae |
| D. | Thylakoid matrix |
| Answer» B. Mitochondrial matrix | |
| 2122. |
Complete oxidation of glucose into pyruvic acid with several intermediate steps is known as (C.B.S.E. 1988;B.H.U. 1986,1989) |
| A. | TCA-pathway |
| B. | Glycolysis |
| C. | HMS-pathway |
| D. | Krebs cycle |
| Answer» C. HMS-pathway | |
| 2123. |
The correct sequence of the three processes of aerobic respiration is |
| A. | Glycolysis, Kreb’s cycle, oxidative phosphorylation. |
| B. | Glycolysis, oxidative phosphorylation and Kreb’s cycle |
| C. | Kreb’s cycle, glycolysis and oxidative phosphorylation |
| D. | oxidative phosphorylation, Kreb’s cycle, glycolysis |
| Answer» B. Glycolysis, oxidative phosphorylation and Kreb’s cycle | |
| 2124. |
Respiratory quotient and compensation point are |
| A. | Not related |
| B. | Inverse to each other |
| C. | Same |
| D. | Applicable to.all organisms. |
| Answer» B. Inverse to each other | |
| 2125. |
By ETS, ATP-synthesis occurs on the (A.I.I.M.S. 1984) |
| A. | Outer membrane of mitochondrion |
| B. | Inner membrane of mitochondrion |
| C. | Matrix |
| D. | None of the above |
| Answer» C. Matrix | |
| 2126. |
If CO2 and 2H are removed from pyruvic acid, it is formed |
| A. | Acetyl co-enzyme A |
| B. | Citric acid |
| C. | Acetate |
| D. | Co-A |
| Answer» D. Co-A | |
| 2127. |
How much energy spent in transport of one pyruvic acid to mitochondrion ? |
| A. | Energy of 1 ATP |
| B. | No energy |
| C. | Energy of 2 ATP |
| D. | Not certain |
| Answer» B. No energy | |
| 2128. |
Fructose 1,6 biphosphate splits into |
| A. | PGAL and DHAP |
| B. | PGAL and PGA |
| C. | PGAL and BPGA |
| D. | PGA and BPGA. |
| Answer» B. PGAL and PGA | |
| 2129. |
Krebs cycle takes place in (CPMT. 1985, 1999, M.P.P.M.T. 1997, AMU. 2000, AFMC 2002, RPMT. 2005) |
| A. | Vesicles of E.R |
| B. | Mitochondria |
| C. | Dictyosomes |
| D. | Chloroplasts. |
| Answer» C. Dictyosomes | |
| 2130. |
It is by-product of Kreb’s cycle |
| A. | Oxaloacetic acid |
| B. | Citric acid |
| C. | Acetyl co-enzyme |
| D. | Acetate. |
| Answer» C. Acetyl co-enzyme | |
| 2131. |
During PPP, RuBP is formed in |
| A. | Mitochondria |
| B. | Cytosol |
| C. | Stroma |
| D. | Chloroplas |
| Answer» C. Stroma | |
| 2132. |
If RQ is 0.7, the substance needs |
| A. | More O2 for respiration |
| B. | Less O2 for respiration |
| C. | O2 is not used for its respiration |
| D. | The substance has more oxygen in its constitution |
| Answer» B. Less O2 for respiration | |
| 2133. |
One ATP is formed when |
| A. | Succinic acid Fumaric acid |
| B. | -ketoglutaric acid Succinyl CoA |
| C. | Succinyl CoA Succinic acid |
| D. | Fumaric acid Malic acid. |
| Answer» D. Fumaric acid Malic acid. | |
| 2134. |
The enzyme required to form acetaldehyde from pyruvic acid is |
| A. | Hexokinase |
| B. | Oxidase |
| C. | Pyruvic acid decarboxylase |
| D. | Alcohol dehydrogenase |
| Answer» D. Alcohol dehydrogenase | |
| 2135. |
Energy currency (reservoir) of the cells is (BHU 1984, Kerala 2001, AMU 2003, MPPMT 2002) |
| A. | AMP |
| B. | ATP |
| C. | RNA |
| D. | DNA |
| Answer» C. RNA | |
| 2136. |
In anaerobic respiration in plants (CM.C 1983, CPM.T. 1992) |
| A. | Oxygen is absorbed |
| B. | Oxygen is released |
| C. | Carbon dioxide is released |
| D. | Carbon dioxide is absorbed. |
| Answer» D. Carbon dioxide is absorbed. | |
| 2137. |
Malic acid is formed from fumaric acid |
| A. | By addition of CO2 |
| B. | By addition of H2O |
| C. | By removal of H2O |
| D. | By removal of CO2 |
| Answer» C. By removal of H2O | |
| 2138. |
Phosphorylation in general is ________ |
| A. | Combination of phosphoric acid with a chemical |
| B. | Formation of PGA by adding P to glycerate |
| C. | Addition of ATP to glucose |
| D. | Synthesis ATP from ADP and P |
| Answer» B. Formation of PGA by adding P to glycerate | |
| 2139. |
When human muscle contracts : |
| A. | Respiration does not occur |
| B. | Anaerobic respiration occurs, if supply of oxygen is insufficient |
| C. | Anaerobic respiration never occurs |
| D. | Always anaerobic respiration occurs. |
| Answer» C. Anaerobic respiration never occurs | |
| 2140. |
What can be done by the number of species in habitat ? |
| A. | Measurement of species diversity in habitat |
| B. | Measurement of gene diversity of species in habitat |
| C. | Measurement of interaction of biocommunities |
| D. | Measurement of function of Ecosystem |
| Answer» B. Measurement of gene diversity of species in habitat | |
| 2141. |
The number of ATP molecules formed in oxidative phosphorylation of one glucose molecule |
| A. | 6 |
| B. | 14 |
| C. | 28 |
| D. | 34 |
| Answer» E. | |
| 2142. |
Find out true options from column I and II. |
| A. | (P - ii) (Q - iv) (R - i) (S - iii) |
| B. | (P - ii) (Q - iii) (R - iv) (S - i) |
| C. | (P - ii) (Q - i) (R - iv) (S - iii) |
| D. | (P - ii) (Q - iii) (R - iv) (S - i) |
| Answer» D. (P - ii) (Q - iii) (R - iv) (S - i) | |
| 2143. |
The number of ATP molecules formed in oxidative phosphorylation of 1 pyruvic acid |
| A. | 6 |
| B. | 14 |
| C. | 28 |
| D. | 34 |
| Answer» C. 28 | |
| 2144. |
In which of family planning method the diagram includes?(image) |
| A. | Temporary methods |
| B. | Permanent method |
| C. | Chemical method |
| D. | Both a and c |
| Answer» B. Permanent method | |
| 2145. |
Full name of GIFT is.... |
| A. | Gamete Intrafellopian transfer |
| B. | Gamete Inferfile Transfer. |
| C. | Gamete In vitro fertilization tube. |
| D. | Gamete Intra fellopion tube. |
| Answer» B. Gamete Inferfile Transfer. | |
| 2146. |
Match following column I and II for STDs and its carrier and select correct option |
| A. | (P - ii) (Q - i) (R - iii) (S - iv) |
| B. | (P - iii) (Q - iv) (R - ii) (S - i) |
| C. | (P - ii) (Q - iii) (R - i) (S - iv) |
| D. | (P - ii) (Q - iv) (R - i) (S - iii) |
| Answer» E. | |
| 2147. |
Which is not true for population explosion ? |
| A. | Increased rate of industrialization and urbanization. |
| B. | Encrochment on land ,air and water. |
| C. | scarecity of food , habitat and clothes. |
| D. | country develops more. |
| Answer» E. | |
| 2148. |
Where does IVF method is useful ? |
| A. | Woman's fallopian tubes are blocked. |
| B. | Man produces very few sperms. |
| C. | Woman produces very few ova. |
| D. | Both a and b. |
| Answer» E. | |
| 2149. |
Why in ART procedures sometimes involve the use of donor eggs or doner sperms ? |
| A. | A woman can not produce ovum. |
| B. | When the woman or man has a genetic disease. |
| C. | Problem in coitus |
| D. | Both a and b |
| Answer» E. | |
| 2150. |
Trade name of weekly oral contraceptive pill is (MP PMT 2004) |
| A. | Mala |
| B. | Shaheli |
| C. | Mala-A |
| D. | Mala-D |
| Answer» C. Mala-A | |