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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.
| 9301. |
Main basis of Neo?Darwinism is [CPMT 1996] |
| A. | Struggle for existence |
| B. | Variations |
| C. | Survival of the fittest |
| D. | Gene theory |
| Answer» C. Survival of the fittest | |
| 9302. |
In which case Darwin theory is wrong [BHU 1995] |
| A. | Arrival of the fittest |
| B. | Survival of the fittest |
| C. | Origin of species |
| D. | High efficiency of reproduction |
| Answer» B. Survival of the fittest | |
| 9303. |
De Vries discarded the principle of [CPMT 1995] |
| A. | Darwin |
| B. | Lamarck |
| C. | Haeckel |
| D. | Mendel |
| Answer» B. Lamarck | |
| 9304. |
Darwin's theory of pangenesis says that passage of factors through generation occurs by production in each cell of the body of [CPMT 1992] |
| A. | Nuclei |
| B. | Germs |
| C. | Gemmules |
| D. | DNA molecules |
| Answer» D. DNA molecules | |
| 9305. |
'The Descent of Man' was published by |
| A. | Charles Darwin in 1871 |
| B. | Charles Darwin in 1859 |
| C. | Hugo de Vries in 1901 |
| D. | Lamarck in 1809 |
| Answer» B. Charles Darwin in 1859 | |
| 9306. |
Natural Selection Theory of Darwin is objected to, because it [CBSE PMT 1991] |
| A. | Stresses upon slow and small variations |
| B. | Stresses upon interspecific competition |
| C. | Explains that natural calamities take a heavy annular toll of lives |
| D. | Explains, adaptation of certain inherited characters |
| Answer» B. Stresses upon interspecific competition | |
| 9307. |
One of the revolutionary concepts in Biology was projected by Charles Darwin in the 'Origin of Species' and has been discussed in [NCERT 1982] |
| A. | Germplasm theory |
| B. | Use and disuse of organs |
| C. | Natural selection leading to the survival of the fittest |
| D. | Gene mutation |
| Answer» D. Gene mutation | |
| 9308. |
The correct meaning of natural selection is [MP PMT 2003] |
| A. | Loss of uncompetant |
| B. | Survival of the fittest |
| C. | Variation |
| D. | Struggle for existence |
| Answer» C. Variation | |
| 9309. |
The idea of natural selection as the fundamental process of evolutionary change was reached [NCERT 1984] |
| A. | Independently by Charles Darwin and Alfred Russel Wallace in 1900 |
| B. | By Charles Darwin 1866 |
| C. | By Alfred Russel Wallace in 1901 |
| D. | Independently by Charles Darwin and Alfred Russel Wallace in 1859 |
| Answer» E. | |
| 9310. |
The idea of "survival of the fittest'' was given by [BHU 1982; AFMC 2005] |
| A. | Darwin |
| B. | Herbert Spencer |
| C. | Malthus |
| D. | Lyell |
| Answer» C. Malthus | |
| 9311. |
Most convincing in Darwin's theory is [CPMT 1976] |
| A. | Malthus essay |
| B. | Population |
| C. | Survival of the fittest |
| D. | Formation of species |
| Answer» E. | |
| 9312. |
Darwin's theory of natural selection to explain organic evolution was based on [CPMT 1982] |
| A. | Modifications in organs through use and disuse |
| B. | Prodigality of reproduction, struggle of existence and survival of fittest |
| C. | Inheritance of acquired characters |
| D. | Appearance of sudden large variations, their inheritance and survival of those having these variations |
| Answer» C. Inheritance of acquired characters | |
| 9313. |
The evolution of species is based upon sum total of the species adaptive changes preserved by [CMC Vellore 1993; CPMT 1973, 83] |
| A. | Man conservation |
| B. | Speciation |
| C. | Natural selection |
| D. | Isolation |
| Answer» E. | |
| 9314. |
"Darwin's finches'' refers to [AIIMS 1993] |
| A. | Fossils of birds collected by Darwin at Galapagos islands |
| B. | A type of birds present on Galapagos islands |
| C. | Migratory birds collected by Darwin at Galapagos islands |
| D. | Fossils of reptiles collected by Darwin at Galapagos island |
| Answer» C. Migratory birds collected by Darwin at Galapagos islands | |
| 9315. |
A scientist who gave a theory very similar to that given by Darwin was [DPMT 1992] |
| A. | Malthus |
| B. | Wallace |
| C. | Goldstein |
| D. | Mendel |
| Answer» C. Goldstein | |
| 9316. |
"Origin of Species'' was published in [CPMT 1974, 2002; Haryana PMT 2005] |
| A. | 1809 |
| B. | 1858 |
| C. | 1956 |
| D. | 1859 |
| Answer» E. | |
| 9317. |
In forming the theory of evolution by natural selection, Darwin was greatly influenced by [CPMT 1978, 93; NCERT 1975, 76, 78, 79] |
| A. | Mutations of Hugo de Vries |
| B. | Malthus idea of population control |
| C. | Environmental factors |
| D. | Lamarck acquired characters |
| Answer» C. Environmental factors | |
| 9318. |
Neo?Darwinism or synthetic theory of evolution is based upon |
| A. | Variation appeared in the structure and physiology of organism due to haphazard mutations |
| B. | High death rate and formation of sub-species |
| C. | Mutation and gene combination |
| D. | All the above |
| Answer» D. All the above | |
| 9319. |
Who is related with 'Galapagos Island' [BHU 1978, 90; MP PMT 1994; AIIMS 1998] |
| A. | Malthus |
| B. | Darwin |
| C. | Wallace |
| D. | Lamarck |
| Answer» C. Wallace | |
| 9320. |
Darwinian theory was unable to explain [BVP 2003] |
| A. | The significance of minute variations |
| B. | Presence of vestigial or useless organs |
| C. | The presence of over specialized organs |
| D. | All of the above |
| Answer» E. | |
| 9321. |
Struggle for existence is |
| A. | Intraspecific |
| B. | Interspecific |
| C. | Environmental |
| D. | All of the above |
| Answer» E. | |
| 9322. |
By performing the replica plating experiment, Lederberg supported the [MP PMT 1987] |
| A. | Gene mutation theory |
| B. | Natural selection theory |
| C. | Lamarck theory |
| D. | Darwinian theory |
| Answer» C. Lamarck theory | |
| 9323. |
If mating is random, population is large and mutation does not occur; then gene frequencies of population from generation to generation remain constant. This was put forwarded by [AIIMS 1993] |
| A. | Lederberg?Lederberg |
| B. | Wallace |
| C. | Hardy Weinberg |
| D. | Haeckel |
| Answer» D. Haeckel | |
| 9324. |
Replica plating experiment was performed to prove the |
| A. | Pre-adaptive mutation |
| B. | Variations |
| C. | Isolations |
| D. | Reproductive mutation |
| Answer» C. Isolations | |
| 9325. |
The pangenes of an animals are accumulated in |
| A. | Zygote |
| B. | Gametes |
| C. | Blood |
| D. | Gene pool |
| Answer» C. Blood | |
| 9326. |
Who wrote the "Origin of Species'' [CPMT 1978, 80, 89, 93] |
| A. | G.J. Mendel |
| B. | Lamarck |
| C. | de Vries |
| D. | Charles Darwin |
| Answer» E. | |
| 9327. |
Which one of the following is the product of dark reaction of photosynthesis [Bihar MDAT 1991] |
| A. | \[C{{O}_{2}}\] |
| B. | ATP |
| C. | Pyruvic acid |
| D. | Phosphoglyceraldehyde |
| Answer» E. | |
| 9328. |
In dark reaction, first reaction is the |
| A. | Carboxylation |
| B. | Decarboxylation |
| C. | Dehydrogenation |
| D. | Deamidation |
| Answer» B. Decarboxylation | |
| 9329. |
Phosphatase enzymes in\[{{C}_{3}}\]cycle participate in |
| A. | Addition of phosphate |
| B. | Removal of phosphate |
| C. | Both the above |
| D. | The enzyme is not concerned with removal or addition of phosphate |
| Answer» C. Both the above | |
| 9330. |
First stable product of Calvin cycle has |
| A. | 2 carbon atoms |
| B. | 3 carbon atoms |
| C. | 4 carbon atoms |
| D. | 6 carbon atoms |
| Answer» C. 4 carbon atoms | |
| 9331. |
The number of carbon atoms is five in |
| A. | Xylulose |
| B. | Ribose |
| C. | Ribulose |
| D. | All the above |
| Answer» E. | |
| 9332. |
Which of the following is the first compound that accepts carbon dioxide during dark phase of photosynthesis [BHU 2004] |
| A. | NADP |
| B. | RuBP |
| C. | Ferridoxin |
| D. | Cytochrome |
| Answer» C. Ferridoxin | |
| 9333. |
Which of the following is required for conversion of 3PGAL and dihydroxy acetone phosphate to fructose 1, 6 diphosphate |
| A. | Transketolase |
| B. | Aldolase |
| C. | Phosphatase |
| D. | Hexokinase |
| Answer» C. Phosphatase | |
| 9334. |
Number of carboxylation occur in Calvin cycle, is [DPMT 2004] |
| A. | 0 |
| B. | 1 |
| C. | 2 |
| D. | 3 |
| Answer» C. 2 | |
| 9335. |
Mesophyll chloroplast of which plant alone is capable of synthesising starch or sucrose |
| A. | \[{{C}_{3}}\]plant |
| B. | \[{{C}_{4}}\]plant |
| C. | [a] and [b] both |
| D. | Neither\[{{C}_{3}}\]or\[{{C}_{4}}\] |
| Answer» B. \[{{C}_{4}}\]plant | |
| 9336. |
Which of the enzyme is involved in the conversion of 3PGA to 3PGAL |
| A. | Triose phosphate dehydrogenase |
| B. | Carboxydismutase |
| C. | Phosphatase |
| D. | Aldolase |
| Answer» B. Carboxydismutase | |
| 9337. |
The first stable compound of dark reaction of photosynthesis is [BVP 2000] |
| A. | Phosphoglyceraldehyde |
| B. | Phosphoglyceric acid |
| C. | Fractose |
| D. | Starch |
| Answer» B. Phosphoglyceric acid | |
| 9338. |
In which plant Calvin experimented by radioactive isotopy to discover the stable product of\[{{C}_{3}}\]cycle [Orissa JEE 2005] |
| A. | Chlorella |
| B. | Cycas |
| C. | Carrot |
| D. | Tobacco |
| Answer» B. Cycas | |
| 9339. |
Which of the following is present in Calvin cycle [CBSE PMT 1996] |
| A. | Photophosphorylation |
| B. | Oxidative carboxylation |
| C. | Reductive carboxylation |
| D. | Oxidative phosphorylation |
| Answer» D. Oxidative phosphorylation | |
| 9340. |
\[C{{O}_{2}}\]acceptor in\[{{C}_{3}}\]plants is [CBSE PMT 1995, 96,99; CPMT 1999, 2001; RPMT 2002] |
| A. | Xylulose-5-phosphate |
| B. | 3-phosphoglyceric acid |
| C. | Ribulose 1, 5 diphosphate |
| D. | Phosphoenol pyruvic acid |
| Answer» D. Phosphoenol pyruvic acid | |
| 9341. |
Calvin cycle is [CPMT 1995] |
| A. | Dependent on light |
| B. | Not dependent on light |
| C. | Occurs in light |
| D. | None of these |
| Answer» C. Occurs in light | |
| 9342. |
Which part of the photosynthetic process does not require light and temperature dependent |
| A. | Hill's reaction |
| B. | Blackman's reaction |
| C. | Warburg's reaction |
| D. | Emmerson's reaction |
| Answer» C. Warburg's reaction | |
| 9343. |
For the reduction of one molecule of\[C{{O}_{2}}\]with water, the energy required is |
| A. | 100 kcal |
| B. | 110 kcal |
| C. | 120 kcal |
| D. | 210 kcal |
| Answer» C. 120 kcal | |
| 9344. |
In\[{{C}_{3}}\]plants, the first stable product of photosynthesis during dark reaction is [CPMT 1986, 90, 92; RPMT 1995; MP PMT 1987, 90, 2000; BHU 1995; CBSE PMT 1995; KCET 1998] |
| A. | 3-phosphoglyceric acid |
| B. | Phosphoglyceraldehyde |
| C. | Maleic acid |
| D. | Oxaloacetic acid |
| Answer» B. Phosphoglyceraldehyde | |
| 9345. |
During dark reaction of photosynthesis [CPMT 1985] |
| A. | Water split |
| B. | \[C{{O}_{2}}\]is reduced to organic compounds |
| C. | Chlorophyll is activated |
| D. | 6 carbon sugar is broken down into 3 carbon sugar |
| Answer» C. Chlorophyll is activated | |
| 9346. |
During photosynthesis when PGA is changed into phosphoglyceraldehyde, which of the following reaction occur [BHU 1980] |
| A. | Oxidation |
| B. | Reduction |
| C. | Electrolysis |
| D. | Hydrolysis |
| Answer» C. Electrolysis | |
| 9347. |
Calvin cycle occur in [BHU 1983; MP PMT 1996; BVP 2002] |
| A. | Chloroplasts |
| B. | Cytoplasm |
| C. | Mitochondria |
| D. | Glyoxisomes |
| Answer» B. Cytoplasm | |
| 9348. |
The initial enzyme of Calvin cycle is [BHU 1989, 90] |
| A. | Ribulose 1, 5 diphosphate carboxylase |
| B. | Triose phosphate dehydrogenase |
| C. | Phosphopentokinase |
| D. | Cytochrome oxidase |
| Answer» B. Triose phosphate dehydrogenase | |
| 9349. |
Dark reaction of photosynthesis is called so because [CPMT 1976; RPMT 1985;AMU 1988; JIPMER 1988; NCERT 1980] |
| A. | It can also occur in dark |
| B. | It does not require light energy |
| C. | Cannot occur during day time |
| D. | It occurs more rapidly in night |
| Answer» C. Cannot occur during day time | |
| 9350. |
\[C{{O}_{2}}\]joins the photosynthetic pathway during [CBSE PMT 1988] |
| A. | Light reaction |
| B. | Dark reaction |
| C. | Photosystem-I |
| D. | Photosystem-II |
| Answer» C. Photosystem-I | |