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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.
| 4451. |
An example of a naturally occurring partheno-carpic fruit is [CPMT 1988] |
| A. | Guava |
| B. | Mango |
| C. | Banana |
| D. | Apple |
| Answer» D. Apple | |
| 4452. |
Formation of fruits without fertilization is known as or Ovary\[\xrightarrow{\text{No fertilization}}\]Fruit [CPMT 1986, 93, 97, 98; CBSE PMT 1988; JIPMER 1990; MP PMT 1994; KCET 2000; Kerala CET 2002; AMU 2005; Haryana PMT 2005] |
| A. | Parthenocarpy |
| B. | Parthenogenesis |
| C. | Polyembryony |
| D. | Polygamy |
| Answer» B. Parthenogenesis | |
| 4453. |
Bananas are seedless because they |
| A. | Reproduce asexually |
| B. | Are triploid |
| C. | Are sprayed with hormone |
| D. | Are parthenocarpic |
| Answer» E. | |
| 4454. |
Seedless grapes are produced due to [Manipal 2005] |
| A. | Parthenocarpy |
| B. | Crossing over |
| C. | Parthenogenesis |
| D. | None of these |
| Answer» B. Crossing over | |
| 4455. |
The scientist related with the over throw or the "Theory of spontaneous generation'' and experiments with swan-necked flasks is [CPMT 1986; KCET 2001] |
| A. | Von Helmont |
| B. | Louis Pasteur |
| C. | Miller |
| D. | Haeckel |
| Answer» C. Miller | |
| 4456. |
In his classic experiment on the formation of amino acids, Stanley Miller passed an electric discharge in a mixture of [CPMT 1983, 89; MP PMT 2003; CPMT 2001] |
| A. | Steam, \[C{{H}_{4}},{{H}_{2}}\]and \[N{{H}_{3}}\] |
| B. | \[C{{H}_{4}},C{{O}_{2}},{{O}_{2}}\]and \[{{H}_{2}}\] |
| C. | \[N{{H}_{3}},{{O}_{2}},{{H}_{2}}\] and steam |
| D. | \[C{{H}_{4}},{{H}_{2}},{{N}_{2}}\]and steam |
| Answer» B. \[C{{H}_{4}},C{{O}_{2}},{{O}_{2}}\]and \[{{H}_{2}}\] | |
| 4457. |
The complex organic compounds that may have first evolved in the direction of origin of life on earth, may have been [CPMT 1981] |
| A. | Proteins and amino acids |
| B. | Proteins and nucleic acids |
| C. | Urea and nucleic acids |
| D. | Urea and amino acids |
| Answer» C. Urea and nucleic acids | |
| 4458. |
Nucleoprotein gave most probably the first sign of [CPMT 1978] |
| A. | Life |
| B. | Amino acids |
| C. | Soil |
| D. | Sugar |
| Answer» B. Amino acids | |
| 4459. |
Which one of the following experiments suggests that simplest living organisms could not have originated spointaneously from non-living matter [CBSE PMT 2005] |
| A. | Larvae could appear in decaying organic matter |
| B. | MIcrobes did not appear in stored meat |
| C. | Microbes appeared from unsterilized organic matter |
| D. | Meat was not spoiled, when heated and kept sealed in a vessel. |
| Answer» E. | |
| 4460. |
The idea that life originates from preexisting life is referred as [J&K 2005] |
| A. | Biogenesis theory |
| B. | Special creation theroy |
| C. | Abiogenesis theory |
| D. | Extraterrestrial theory |
| Answer» B. Special creation theroy | |
| 4461. |
Stanley Miller proposed origin of life by [J&K 2005] |
| A. | Chemical synthesis |
| B. | Abiogenesis |
| C. | Biogenesis |
| D. | None of these |
| Answer» B. Abiogenesis | |
| 4462. |
First cell produced on earth is [Manipal 2005] |
| A. | Protobiont |
| B. | Protozoa |
| C. | Metazoa |
| D. | None of these |
| Answer» B. Protozoa | |
| 4463. |
Which of the following was most likely to have been absent in free form in the primordial atmosphere at the time of origin of life [CPMT 1974, 76, 78, 82, 90, 98; AFMC 1985; NCERT 1971, 72; KCET 1998; MP PMT 1994, 99; CBSE PMT 2004; BVP 2004; BCECE 2005] |
| A. | \[{{O}_{2}}\] |
| B. | \[C{{H}_{4}}\] |
| C. | \[{{H}_{2}}\] |
| D. | \[N{{H}_{3}}\] |
| Answer» B. \[C{{H}_{4}}\] | |
| 4464. |
The part of the earth where life is exists, made up of [AMU 2005] |
| A. | Lithosphere |
| B. | Hydrosphere |
| C. | Atmosphere |
| D. | All of the above |
| Answer» E. | |
| 4465. |
Big bang theory was proposed by [BVP 2001] |
| A. | Kant |
| B. | Lemaitre |
| C. | K. Bahadur |
| D. | Weismann |
| Answer» C. K. Bahadur | |
| 4466. |
The gases used in the spark-discharge apparatus were [KCET 2004] |
| A. | \[{{H}_{2}},C{{H}_{4}}\] and \[N{{H}_{3}}\] |
| B. | \[CO,N{{H}_{3}},\] and \[C{{H}_{4}}\] |
| C. | \[{{O}_{2}},C{{O}_{2}},\] and \[N{{H}_{3}}\] |
| D. | \[N{{H}_{3}},C{{H}_{4}}\]and \[{{O}_{2}}\] |
| Answer» B. \[CO,N{{H}_{3}},\] and \[C{{H}_{4}}\] | |
| 4467. |
Coacervates were experimentally produced by [KCET 2004] |
| A. | Urey and Miller |
| B. | Jacob and Monod |
| C. | Fischer and Huxley |
| D. | Sidney Fox and Oparin |
| Answer» E. | |
| 4468. |
The diagram represents Miller's experiment. Choose the correct combination of labelling. [Kerala CET 2004] |
| A. | A-electrodes, B-\[N{{H}_{3}}+{{H}_{2}}+{{H}_{2}}O+C{{H}_{4}},\]C-cold water, D-vacuum, E-U trap |
| B. | A-electrodes, B-\[N{{H}_{4}}+{{H}_{2}}+C{{O}_{2}}+C{{H}_{3}},\]C-hot water, D-vacuum, E-U trap |
| C. | A-electrodes, B-\[N{{H}_{3}}+{{H}_{2}}O\], C-hot water, D-tap, E-U trap |
| D. | A-electrodes, B-\[N{{H}_{3}}+{{H}_{2}}+{{H}_{2}}O+C{{H}_{4}}\], C-steam, D-vacuum, E-U trap |
| E. | (e) A-electrodes, B-\[N{{H}_{3}}+C{{H}_{4}}\],C-cold water, D-sink, E-U trap. |
| Answer» B. A-electrodes, B-\[N{{H}_{4}}+{{H}_{2}}+C{{O}_{2}}+C{{H}_{3}},\]C-hot water, D-vacuum, E-U trap | |
| 4469. |
According to one of the most widely accepted theories the earth's atmosphere, before any life had originated on this planet, consisted of a mixture of [CPMT 1981, 84, 2002] |
| A. | Water vapours, \[{{H}_{2}},N{{H}_{3}}\] and \[C{{H}_{4}}\] |
| B. | \[{{H}_{2}},C{{O}_{2}},N{{H}_{3}}\]and \[C{{H}_{4}}\] |
| C. | \[{{O}_{2}},N{{H}_{3}},C{{H}_{4}}\] and water vapours |
| D. | Ozone, \[C{{H}_{4}},{{O}_{2}}\] and water vapours |
| Answer» B. \[{{H}_{2}},C{{O}_{2}},N{{H}_{3}}\]and \[C{{H}_{4}}\] | |
| 4470. |
Coacervates are [Kerala CET 2003] |
| A. | Colloid droplets |
| B. | Contain nucleoprotein |
| C. | Both (a) and (b) |
| D. | Protobiont |
| Answer» D. Protobiont | |
| 4471. |
The spark-discharge apparatus to test chemical evolution of life was designed by [KCET 2001] |
| A. | Oparin and Haldane |
| B. | Miller and Urey |
| C. | Jacob and Monad |
| D. | Dixon and Jolley |
| Answer» C. Jacob and Monad | |
| 4472. |
Theory of special creation was given by [Pb. PMT 2000] |
| A. | Weisman |
| B. | Helmont |
| C. | Manpertuis |
| D. | Father Saurez |
| Answer» E. | |
| 4473. |
The abiogenesis occurred about how many billion years ago [Pb. PMT 1999;CPMT 2000; KCET 2000] |
| A. | 1.2 billion |
| B. | 1.5 billion |
| C. | 2.5 billion |
| D. | 3.5 billion |
| Answer» E. | |
| 4474. |
How has the free \[{{O}_{2}}\] been released into the earth's atmosphere whereas there was no free \[{{O}_{2}}\] at the time of origin of life |
| A. | By catabolic activity of animals |
| B. | By photosynthetic activity |
| C. | By heating of the earth |
| D. | None of the above |
| Answer» C. By heating of the earth | |
| 4475. |
Chemical theory of origin of life was given by [CPMT 1999; JIPMER 2001] |
| A. | Stanley Miller |
| B. | Oparin and Haldane |
| C. | Louis Pasteur |
| D. | Spallanzani |
| Answer» C. Louis Pasteur | |
| 4476. |
Under certain conditions scientists have obtained cell-like structures. These are known as [MP PMT 1999; Pb. PMT 2000] |
| A. | Microbes |
| B. | Protists |
| C. | Coacervates |
| D. | Prebiotic soup |
| Answer» D. Prebiotic soup | |
| 4477. |
The presence of salts (NaCl and others) in animal body fluid gives an inference that life originated in the [MP PMT 1999; MP PMT 1998] |
| A. | Salt solutions |
| B. | Rain water |
| C. | Primitive ocean |
| D. | None of the above |
| Answer» D. None of the above | |
| 4478. |
Origin of life took place in/on [MP PMT 1997; CPMT 1991] |
| A. | Water |
| B. | Air |
| C. | Mountains |
| D. | Land |
| Answer» B. Air | |
| 4479. |
Life originated in |
| A. | Precambrian era |
| B. | Proterozoic era |
| C. | Mesozoic era |
| D. | Caenozoic era |
| Answer» B. Proterozoic era | |
| 4480. |
Which one of the following is the correct sequence of chemical substances produced during the origin of life on the earth [CBSE PMT 1996; AIEEE Pharmacy 2004] |
| A. | Water, amino acid, nucleic acid and enzyme |
| B. | Glucose, amino acid, nucleic acid and protein |
| C. | Amino acid, ammonium phosphate and nucleic acid |
| D. | Ammonia, amino acid, protein and nucleic acid |
| Answer» B. Glucose, amino acid, nucleic acid and protein | |
| 4481. |
The four elements that make up 99% of all elements found in a living system are [CBSE PMT 1994] |
| A. | H, O, C, N |
| B. | C, H, O, S |
| C. | C, H, O, P |
| D. | C, N, O, P |
| Answer» B. C, H, O, S | |
| 4482. |
'Origin of life' as a result of chemical evolution has been properly explained by |
| A. | Miller |
| B. | Oparin |
| C. | Haldane |
| D. | Fox |
| Answer» C. Haldane | |
| 4483. |
The most vital process for the existence of life on earth is [KCET 1994] |
| A. | Communication in animals |
| B. | Photosynthesis by plants |
| C. | Reproduction in plants and animals |
| D. | Respiration in animals |
| Answer» C. Reproduction in plants and animals | |
| 4484. |
The first organisms to appear on earth were more like plants because [NCERT 1977] |
| A. | Plants are simpler |
| B. | Plants are more |
| C. | Plants do photosynthesis |
| D. | None of the above |
| Answer» D. None of the above | |
| 4485. |
'Origin of life' was written by [MP PMT 1997] |
| A. | Darwin |
| B. | Oparin |
| C. | Gray |
| D. | Smith |
| Answer» C. Gray | |
| 4486. |
According to Oparin, life originated as [CPMT 1991] |
| A. | Self reproduction |
| B. | God's desire |
| C. | Effect of sunlight on mud |
| D. | None of these |
| Answer» B. God's desire | |
| 4487. |
Formation of which complex molecules was noticed by Urey and Miller when they subjected substances like \[N{{H}_{3}},C{{H}_{4}},{{H}_{2}}O\] etc. to electric discharge [CBSE PMT 1993; BHU 2004] |
| A. | Aquaregia |
| B. | \[{{H}_{2}}S{{O}_{4}}\] |
| C. | \[HCN\] |
| D. | Amino acids |
| Answer» D. Amino acids | |
| 4488. |
Which one of the following is the "Secret of life'' |
| A. | Fatty acids |
| B. | Amino acids |
| C. | Proteins |
| D. | Nucleic acid |
| Answer» E. | |
| 4489. |
There is no life on moon because there is no [NCERT 1973] |
| A. | Carbon |
| B. | Nitrogen |
| C. | Water |
| D. | Silicates |
| Answer» D. Silicates | |
| 4490. |
The cells which does not contain nucleus and mitochondria are known as |
| A. | Primitive protozoan |
| B. | Primitive algae |
| C. | Eubiont |
| D. | Bacteria |
| Answer» E. | |
| 4491. |
An experiment to prove that organic compounds were the basis of life, was performed by [CPMT 1986; MP PMT 1994] |
| A. | Oparin |
| B. | Miller |
| C. | Melvin |
| D. | Fox |
| Answer» C. Melvin | |
| 4492. |
Growth by the absorption of molecules from the environment form the |
| A. | Macromolecules |
| B. | Coacervates |
| C. | Primitive molecules |
| D. | Protomolecules |
| Answer» C. Primitive molecules | |
| 4493. |
Source of energy at the time of origin of life |
| A. | Heat, cosmic rays and lightning |
| B. | Heat only |
| C. | Cosmic rays only |
| D. | Lightning only |
| Answer» B. Heat only | |
| 4494. |
Louis Pasteur's view on the origin of life is that |
| A. | Life originated within six days |
| B. | Life originated spontaneously from the living organisms only |
| C. | Life originated spontaneously from the non-living substances |
| D. | Life came from other planet |
| Answer» C. Life originated spontaneously from the non-living substances | |
| 4495. |
About how long ago was the earth formed [CPMT 1999] |
| A. | 4.6 billion years ago |
| B. | 10 billion years ago |
| C. | 3.0 billion years ago |
| D. | 20 billion years ago |
| Answer» B. 10 billion years ago | |
| 4496. |
Type of nutrition in the primitive cells |
| A. | Heterotrophic or holozoic |
| B. | Heterophytic or holophytic |
| C. | Saprophytic |
| D. | Saprozoic |
| Answer» B. Heterophytic or holophytic | |
| 4497. |
The viruses contain [AFMC 1986] |
| A. | Proteins only |
| B. | DNA only |
| C. | Nucleic acids only |
| D. | Proteins, DNA or RNA (nucleic acids) |
| Answer» E. | |
| 4498. |
Abiogenesis means [AFMC 1986; CPMT 2002; BHU 2001; J&K CET 2002] |
| A. | Origin of life from non-living organisms |
| B. | Origin of life from living organisms |
| C. | Origin of viruses and microbes |
| D. | Spontaneous generation |
| Answer» B. Origin of life from living organisms | |
| 4499. |
Pasteur succeeded in disproving the spontaneous generation theory because [DPMT 1992] |
| A. | He was lucky |
| B. | He was ingenious in drawing out the neck of the glass flasks so as to provide access to air but not to the micro-organism |
| C. | Of the fact that the sample of yeast taken by him was dead |
| D. | Of the clean surroundings of his laboratory |
| Answer» C. Of the fact that the sample of yeast taken by him was dead | |
| 4500. |
The idea of spontaneous generation was first refuted by [DPMT 2003; Kerala CET 2003] |
| A. | L. Pasteur |
| B. | L. Spallanzani |
| C. | F. Redi |
| D. | S.L. Miller |
| Answer» D. S.L. Miller | |