MCQOPTIONS
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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 7051. |
The socio-religious cause of growth in population is |
| A. | Early marriages only |
| B. | Non-adoption of family planning methods only |
| C. | Desire to have male heir only |
| D. | All of the above |
| Answer» E. | |
| 7052. |
The graph in exponential growth will be |
| A. | Sigmoid |
| B. | 'J' shaped |
| C. | 'S' shaped |
| D. | a and c both |
| Answer» C. 'S' shaped | |
| 7053. |
Which one of the following is not the consequences of the population explosion |
| A. | Unemployment and poverty |
| B. | Pollution and housing problem |
| C. | Low natality and high mortality |
| D. | Scarcity of food available |
| Answer» D. Scarcity of food available | |
| 7054. |
When environmental conditions are favourable, then population growth curve will be [MP PMT 2000] |
| A. | Sigmoid |
| B. | 'J' Shaped |
| C. | 'S' shaped |
| D. | a and c both |
| Answer» C. 'S' shaped | |
| 7055. |
In stable population predation [DPMT 1992] |
| A. | Is harmful |
| B. | Is beneficial |
| C. | Increases the number of predators |
| D. | Depletes the prey |
| Answer» E. | |
| 7056. |
Whose technique is employed for the extraction and elimination of hormones [CPMT 1986] |
| A. | Beck |
| B. | Beer |
| C. | Garner |
| D. | Allard |
| Answer» D. Allard | |
| 7057. |
Phytohormones are used in |
| A. | Parthenacarpy |
| B. | Grafting |
| C. | Ripening of fruits |
| D. | All the above |
| Answer» E. | |
| 7058. |
In which of the following respect, the plant hormones differ from enzymes [BVP 2003] |
| A. | Required in less quantity |
| B. | They are expanded in the process |
| C. | They release some energy |
| D. | None of the above |
| Answer» B. They are expanded in the process | |
| 7059. |
By hormone application it is possible to obtain seedless fruits. In which of the following it is desirable to obtain seedless fruits [CPMT 1985] |
| A. | Tomato |
| B. | Orange |
| C. | Watermelon |
| D. | Pomegranate (Anar) |
| Answer» E. | |
| 7060. |
Grass coleoptile tip bend towards source of light because |
| A. | It likes the sun |
| B. | It is heavy |
| C. | It needs darkness |
| D. | Due to some secretion from tip |
| Answer» E. | |
| 7061. |
Who used the term 'phytohormones' for plant hormone |
| A. | Balis |
| B. | Morgan |
| C. | Went |
| D. | Thimman |
| Answer» E. | |
| 7062. |
Certain chemical substances having profound effect on growth, are called [MP PMT 1997] |
| A. | Catalytic agents |
| B. | Phytohormones |
| C. | Enzymes |
| D. | Compost |
| Answer» C. Enzymes | |
| 7063. |
Among plants ?pheromones? are secreted by the cells of following plants for the given function [BHU 1994] |
| A. | All plants for growth and development |
| B. | Yeast for facilitating mating |
| C. | All fungi for sexual reproduction |
| D. | Rhizopus for the formation of zygospore |
| Answer» E. | |
| 7064. |
Why the newly harvested potato tubers do not germinate even when placed in favourable conditions |
| A. | Due to dormancy |
| B. | Due to lack of water absorption |
| C. | Due to difficulty of light penetration |
| D. | Due to lack of photosynthetic apparatus |
| Answer» B. Due to lack of water absorption | |
| 7065. |
Legume seeds exhibit dormancy because of [DPMT 1986] |
| A. | Undeveloped embryo |
| B. | Hard seed coat |
| C. | Absence of cytokinin |
| D. | Absence of\[G{{A}_{3}}\] |
| Answer» C. Absence of cytokinin | |
| 7066. |
The natural plant hormones were first isolated from [CPMT 1989] |
| A. | Corn germ oil and human urine |
| B. | Cotton fruits, spinach leaves and rice plants |
| C. | Avena coleoptile spinach leaves and the fungus gibberella |
| D. | Human urine and rice seedlings |
| Answer» B. Cotton fruits, spinach leaves and rice plants | |
| 7067. |
Which of the following technique is employed for the separation and identification of phytohormones |
| A. | Polarizing microscopy |
| B. | Autoradiography |
| C. | Gas chromatography |
| D. | Cell fractionation |
| Answer» D. Cell fractionation | |
| 7068. |
Who for the first time speculated the presence of organ forming substances in plant now called hormones [MP PMT 2001] |
| A. | Darwin |
| B. | Went |
| C. | Yabuta |
| D. | Sachs |
| Answer» E. | |
| 7069. |
Substances which originate at the tip of stem and root and control the growth of different organs are [AFMC 1984, 86; CPMT 1984] |
| A. | Enzymes |
| B. | Hormones |
| C. | Vitamins |
| D. | Food substances |
| Answer» C. Vitamins | |
| 7070. |
Phytohormones control [CBSE PMT 1990] |
| A. | Growth |
| B. | Physiological functions |
| C. | Rooting |
| D. | Flowering |
| Answer» B. Physiological functions | |
| 7071. |
Which of the following substances act as a key growth regulator |
| A. | ATP and food |
| B. | Hormones |
| C. | Enzymes |
| D. | Auxin and vitamins |
| Answer» C. Enzymes | |
| 7072. |
'Climacteric' is |
| A. | A phenomenon related to fruit ripening |
| B. | The condition of a plant when all of its fruits are almost ripe |
| C. | The condition of a plant when most of its leaves have turned yellow |
| D. | None of the above |
| Answer» B. The condition of a plant when all of its fruits are almost ripe | |
| 7073. |
A tissue that does not form hormones is |
| A. | Xylem |
| B. | Sclerenchyma |
| C. | Both [a] and [b] |
| D. | None of these |
| Answer» D. None of these | |
| 7074. |
Rhizocalin is an additional hormonal substance which is secreted by |
| A. | Cotyledons |
| B. | Roots |
| C. | Leaves |
| D. | Stem |
| Answer» D. Stem | |
| 7075. |
Phytotron is a device by which [MP PMT 1986; BHU 1978; CPMT 1995] |
| A. | Electrons are bombarded |
| B. | Protons are liberated |
| C. | Plants are grown in controlled environment |
| D. | Mutations are produced in plants |
| Answer» D. Mutations are produced in plants | |
| 7076. |
How many water molecules are used in glycolysis |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 7077. |
Isomerization step takes place in |
| A. | Glycolysis |
| B. | Kreb's cycle |
| C. | Oxidative phosphorylation |
| D. | None of the above |
| Answer» B. Kreb's cycle | |
| 7078. |
Which of the following is formed in presence of pyruvate kinase |
| A. | Phosphoenol pyruvic acid |
| B. | Pyruvic acid |
| C. | Both [a] and [b] |
| D. | None of the above |
| Answer» C. Both [a] and [b] | |
| 7079. |
Which of the following is called the Harden and Young's ester |
| A. | Fructose-6-phosphate |
| B. | Glucose-6-phosphate |
| C. | Fructose 1, 6 diphosphate |
| D. | None of the above |
| Answer» D. None of the above | |
| 7080. |
Which of the following is called Newber's ester |
| A. | Glucose-6-phosphate |
| B. | Fructose-6-phosphate |
| C. | Fructose 1, 6 diphosphate |
| D. | All the above |
| Answer» C. Fructose 1, 6 diphosphate | |
| 7081. |
Which is not true for glycolysis [Manipal 2005] |
| A. | End product is\[C{{O}_{2}}\],\[{{H}_{2}}O\] |
| B. | Substiate level phosphorylation |
| C. | Production of ATP |
| D. | Expenditure of ATP |
| Answer» B. Substiate level phosphorylation | |
| 7082. |
How many ATP are used in glycolysis or For complete phosphorylation of a glucose molecule, how many ATP molecules are required |
| A. | 4 |
| B. | 2 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 7083. |
Decarboxylation is not involved in [DPMT 2004] |
| A. | Electron transport system |
| B. | Glycolysis |
| C. | Kreb's cycle |
| D. | Alcoholic fermentation |
| Answer» C. Kreb's cycle | |
| 7084. |
Which one is correct sequence in glycolysis [MHCET 2004] |
| A. | G 6-P\[\to \]PEP\[\to \]3-PGAL\[\to \]3-PGA |
| B. | G 6-P\[\to \]3-PGAL\[\to \]3-PGA\[\to \]PEP |
| C. | G 6-P\[\to \]PEP\[\to \]3-PGA\[\to \]3 - PGAL |
| D. | G 6-P\[\to \]3-PGA\[\to \]3-PGAL\[\to \]PEP |
| Answer» C. G 6-P\[\to \]PEP\[\to \]3-PGA\[\to \]3 - PGAL | |
| 7085. |
Which one of the following is the first step of glycolysis [DPMT 2004] |
| A. | Breakdown of glucose |
| B. | Phosphorylation of glucose |
| C. | Conversion of glucose into fructose |
| D. | Dehydrogenation of glucose |
| Answer» C. Conversion of glucose into fructose | |
| 7086. |
Glycolysis occurs in [AFMC 2003] |
| A. | Generally in all the cells |
| B. | In only eukaryotes |
| C. | Only in prokaryotes |
| D. | Only in higher animals |
| Answer» B. In only eukaryotes | |
| 7087. |
The first phase in the breakdown of glucose in animal cells is [BVP 2002; AIEEE 2004] |
| A. | Kreb's cycle |
| B. | Glycolysis |
| C. | Electron transport system |
| D. | Lipid biosynthesis |
| Answer» C. Electron transport system | |
| 7088. |
Glycolysis is found in cytoplasm of virtually all types of aerobic/anaerobic cells. In this process, glucose is converted into a compound which is [AIIMS 2002] |
| A. | PEP |
| B. | Pyruvic acid |
| C. | Acetyl CoA |
| D. | Citric acid |
| Answer» C. Acetyl CoA | |
| 7089. |
Which of the following process occurs in glycolysis [JIPMER 2002] |
| A. | Oxidation |
| B. | Reduction |
| C. | Hydrogenation |
| D. | Fixation |
| Answer» B. Reduction | |
| 7090. |
Glycolysis occurs [BVP 2001] |
| A. | In cytoplasm |
| B. | In aerobic respiration |
| C. | In anaerobic respiration |
| D. | All of the above |
| Answer» E. | |
| 7091. |
During fermentation alcohol is formed from [MHCET 2001] |
| A. | Sugars |
| B. | Proteins |
| C. | \[C{{O}_{2}}+{{H}_{2}}O\] |
| D. | None of these |
| Answer» C. \[C{{O}_{2}}+{{H}_{2}}O\] | |
| 7092. |
The oxidation of one\[NAD{{H}_{2}}\] yields [KCET 2000] |
| A. | 18 ATP |
| B. | 6 ATP |
| C. | 3 ATP |
| D. | 2 ATP |
| Answer» D. 2 ATP | |
| 7093. |
Which one of the following products is formed during glycolysis of glucose [MP PMT 1995, 2000, 02; AIIMS 2002] |
| A. | Pyruvic acid |
| B. | Carbon dioxide |
| C. | Citric acid |
| D. | Ethanol |
| Answer» B. Carbon dioxide | |
| 7094. |
The formula for the process of glycolysis is [KCET 1994] |
| A. | \[{{C}_{6}}{{H}_{12}}{{O}_{6}}\to 2{{C}_{3}}{{H}_{4}}{{O}_{3}}+4H\] |
| B. | \[{{C}_{6}}{{H}_{12}}{{O}_{6}}+6C{{O}_{2}}\to 6C{{O}_{2}}+6{{H}_{2}}O\] |
| C. | \[6{{H}_{2}}O+6C{{O}_{2}}\to {{C}_{6}}{{H}_{12}}{{O}_{6}}+6C{{O}_{2}}\] |
| D. | None of these |
| Answer» B. \[{{C}_{6}}{{H}_{12}}{{O}_{6}}+6C{{O}_{2}}\to 6C{{O}_{2}}+6{{H}_{2}}O\] | |
| 7095. |
The common phase between aerobic and anaerobic respiration is called [DPMT 1990; MP PMT 1992] |
| A. | Tricarboxylic acid cycle |
| B. | Oxidative phosphorylation |
| C. | Embden, Meyerhoff, Parnas cycle |
| D. | Kreb's cycle |
| Answer» D. Kreb's cycle | |
| 7096. |
During respiration, pyruvic acid is formed by [CPMT 1986; BHU 1995] |
| A. | Glycolysis |
| B. | Kreb's cycle |
| C. | HMP pathway |
| D. | None of the above |
| Answer» B. Kreb's cycle | |
| 7097. |
The enzyme which converts glucose to glucose -6-phosphate is [BHU 1986; MP PMT 1996; AIIMS1999; Pb. PMT 1999, 2000] |
| A. | Phosphorylase |
| B. | Glucose-6-phosphate |
| C. | Hexokinase |
| D. | Glucose synthetase |
| Answer» D. Glucose synthetase | |
| 7098. |
The number of molecules of pyruvic acid formed from one molecule of glucose at the end of glycolysis is [MP PMT 1986] |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 7099. |
Pyruvate (pyruvic acid) dehydrogenase is used in converting [BHU 1986] |
| A. | Pyruvate to glucose |
| B. | Glucose to pyruvate |
| C. | Pyruvic acid to lactic acid |
| D. | Pyruvate (pyruvic acid) to acetyl CoA |
| Answer» E. | |
| 7100. |
For the enzyme enolase, the substrate is |
| A. | Succinic acid |
| B. | 2 PGA |
| C. | PEP |
| D. | Fumaric acid |
| Answer» C. PEP | |