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.
| 4801. |
Which of the following is not found in DNA [CPMT 2005] |
| A. | Adenine |
| B. | Cytosine |
| C. | Uracil |
| D. | Thymine |
| Answer» D. Thymine | |
| 4802. |
In a hair pin model of RNA which nitrogen base is present at the short end [MHCET 2002] |
| A. | Adenine |
| B. | Guanine |
| C. | Thymine |
| D. | Cytosine |
| Answer» C. Thymine | |
| 4803. |
The element absent in RNA is [AMU 2005] |
| A. | Nitrogen |
| B. | Sulpher |
| C. | Oxygen |
| D. | Hydrogen |
| Answer» C. Oxygen | |
| 4804. |
There are special proteins that help to open up DNA double helix in front of the replication fork. These protein are [MHCET 2003] |
| A. | DNA ligase |
| B. | DNA gyrase |
| C. | DNA polymerase I |
| D. | None of these |
| Answer» C. DNA polymerase I | |
| 4805. |
During DNA replication, the strands separate by [MHCET 2002] |
| A. | DNA polymerase |
| B. | Unwindase |
| C. | Gyrase |
| D. | Topoisomerase |
| Answer» C. Gyrase | |
| 4806. |
New strand on a DNA template is initiated by [MHCET 2002] |
| A. | RNA polymerase |
| B. | DNA polymerase |
| C. | DNA ligase |
| D. | None of the above |
| Answer» E. | |
| 4807. |
Which RNA carries information from DNA in protein synthesis [BVP 2000] |
| A. | s-RNA |
| B. | t-RNA |
| C. | r-RNA |
| D. | m-RNA |
| Answer» E. | |
| 4808. |
The bacterium used in Griffith's experiment was [MHCET 2004] |
| A. | Bacillus |
| B. | Monococcus |
| C. | Diplococcus |
| D. | Spirillum |
| Answer» D. Spirillum | |
| 4809. |
Transforming principle in Griffith's experiment was DNA. It was discovered by [MH-CET 2004] |
| A. | Zinder and Lederberg |
| B. | Avery, McLeod and McCarthy |
| C. | Lederberg and Tatum |
| D. | Zinder and Tatum |
| Answer» C. Lederberg and Tatum | |
| 4810. |
Synthesis of RNA is [MHCET 2004] |
| A. | Transcription |
| B. | Translation |
| C. | Translocation |
| D. | Transduction |
| Answer» B. Translation | |
| 4811. |
DNA repairing is done by [BHU 1985; Kerala CET 2002; AFMC 2004; Orissa JEE 2004] |
| A. | Ligase |
| B. | DNA polymerase III |
| C. | DNA polymerase II |
| D. | DNA polymerase I |
| Answer» B. DNA polymerase III | |
| 4812. |
How many types of ribonucleic acids are known |
| A. | One type |
| B. | Two types |
| C. | Three types |
| D. | Four types |
| Answer» D. Four types | |
| 4813. |
Which one of the following is a base analogue [BHU 1984] |
| A. | Nitrous acid |
| B. | Colchicine |
| C. | 5 - bromouracil |
| D. | Caffeine |
| Answer» D. Caffeine | |
| 4814. |
One of the ways in which the nitrogen of atmosphere is converted into nitrate for plants is by the action of |
| A. | Temperature |
| B. | Lightning |
| C. | Denitrifying bacteria |
| D. | Decay |
| Answer» C. Denitrifying bacteria | |
| 4815. |
Nitrogen is an important constituent of [MP PMT 1994, 2002] |
| A. | Proteins |
| B. | Lipids |
| C. | Carbohydrates |
| D. | Polyphosphates |
| Answer» B. Lipids | |
| 4816. |
Element required by plant in large quantity is [CPMT 1984, 85; DPMT 1992] |
| A. | Nitrogen |
| B. | Calcium |
| C. | Sulphur |
| D. | Phosphorus |
| Answer» B. Calcium | |
| 4817. |
An important essential element is necessary in plants for protein synthesis [MP PMT 1991] |
| A. | Calcium |
| B. | Phosphorus |
| C. | Magnesium |
| D. | Nitrogen |
| Answer» E. | |
| 4818. |
Cell elongation is adversely affected by |
| A. | Sodium |
| B. | Cobalt |
| C. | Manganese |
| D. | Nitrogen |
| Answer» E. | |
| 4819. |
The possibility of increase of infectious disease become more due to more supply of |
| A. | Potassium |
| B. | Magnesium |
| C. | Copper |
| D. | Nitrogen |
| Answer» E. | |
| 4820. |
\[{{N}_{2}}\] fixation is [Orissa JEE 2005] |
| A. | \[{{N}_{2}}\to N{{H}_{3}}\] |
| B. | \[{{N}_{2}}\to N{{O}_{3}}\] |
| C. | \[{{N}_{2}}\to \]Amino acid |
| D. | Both [a] and [b] |
| Answer» E. | |
| 4821. |
Which of the following pigments is essential for nitrogen fixation by leguminous plants [HP PMT 2005] |
| A. | Anthocyanin |
| B. | Phycocyanin |
| C. | Phycoerythrin |
| D. | Leghaemoglobin |
| Answer» E. | |
| 4822. |
The conversion of ammonia into nitrites and nitrates is called [J&K CET 2005] |
| A. | Ammonification |
| B. | Nitrification |
| C. | Denitrification |
| D. | All of these |
| Answer» C. Denitrification | |
| 4823. |
Nitrates are converted to nitrogen by [Pb. PMT 2004] |
| A. | Nitrogen fixing bacteria |
| B. | Ammonification bacteria |
| C. | Denitrifying bacteria |
| D. | Nitrifying bacteria |
| Answer» D. Nitrifying bacteria | |
| 4824. |
Nif genes occur in [CPMT 2004] |
| A. | Rhizobium |
| B. | Aspergillus |
| C. | Penicillium |
| D. | Streptococcus |
| Answer» B. Aspergillus | |
| 4825. |
Symbiotic microorganism is [MP PMT 2003; AIEEE 2004] |
| A. | Clostridium |
| B. | Azotobacter |
| C. | Rhizobium |
| D. | Chromatium |
| Answer» D. Chromatium | |
| 4826. |
Which of the following deficiency may cause the reduction in the growth of leaves |
| A. | Nitrogen |
| B. | Sodium |
| C. | Manganese |
| D. | Iron |
| Answer» B. Sodium | |
| 4827. |
Fertilizers have a formula written in a set of three figures 8 - 10- 22. What for does it stand |
| A. | % of Ca, Mg, P |
| B. | % of N, S, P |
| C. | % of N, P, K |
| D. | % of Fe, Mg, K |
| Answer» D. % of Fe, Mg, K | |
| 4828. |
Which of the following is a fertilizer |
| A. | Ammonium chloride |
| B. | Urea |
| C. | Calcium citrate |
| D. | Calcium carbonate |
| Answer» C. Calcium citrate | |
| 4829. |
Nitrogen fixation means [MHCET 2003] |
| A. | \[{{N}_{2}}\] changes in \[NO_{3}^{-}\] |
| B. | \[{{N}_{2}}\] changes in \[N{{H}_{3}}\] |
| C. | \[NO_{2}^{-}\] change into nitrates |
| D. | None of these |
| Answer» C. \[NO_{2}^{-}\] change into nitrates | |
| 4830. |
Knot like bodies known as 'nodules' found in the roots of groundnut plant are produced by [BHU 2003] |
| A. | Azospirillum |
| B. | Azotobacter |
| C. | Pseudomonas |
| D. | Rhizobium |
| Answer» E. | |
| 4831. |
Legume plants are important because they [CPMT 2002] |
| A. | Help in \[N{{O}_{2}}\] fixation |
| B. | Not help in \[N{{O}_{2}}\] fixation |
| C. | Increased soil fertility |
| D. | All of these |
| Answer» D. All of these | |
| 4832. |
Nodules with nitrogen fixing bacteria are present in [AFMC 2001; CPMT 2003] |
| A. | Cotton |
| B. | Gram |
| C. | Wheat |
| D. | Mustard |
| Answer» C. Wheat | |
| 4833. |
Members of bean family are particularly important for rotation of crop, because |
| A. | They add green manure |
| B. | They add nitrates to soil |
| C. | They make soil porous |
| D. | They add calcium to soil |
| Answer» C. They make soil porous | |
| 4834. |
Ammonium sulphate is |
| A. | Enzyme |
| B. | Fertilizer |
| C. | Weed killer |
| D. | Pesticide |
| Answer» C. Weed killer | |
| 4835. |
Most of the plants obtain or absorb nitrogen from soil in the form of [AFMC 1975; JIPMER 1987; CPMT 1982, 84; DPMT 1990; Orissa PMT 2002; MP PMT 2005] |
| A. | Free nitrogen gas |
| B. | Nitric acid |
| C. | Nitrite |
| D. | Nitrates |
| Answer» E. | |
| 4836. |
The potential source of natural rubber is |
| A. | Ficus benghalensis (Banyan) |
| B. | Ficus elastica (Rubber plant) |
| C. | Parthenium argentatum (Guayule) |
| D. | All of these |
| Answer» D. All of these | |
| 4837. |
The non traditional potential source of oil crops is |
| A. | Cucurbita foetidissima (Wild gourd) |
| B. | Citrullus colocythis (Colycynth) |
| C. | Both a and b |
| D. | Margosa |
| Answer» D. Margosa | |
| 4838. |
Which of these is not correctly matched [CBSE PMT 1988; Haryana PMT 2000] |
| A. | Parthenium argentatum - Furniture wood is obtained |
| B. | Leucaena leucocephala - Fixes atmospheric nitrogen |
| C. | Simmondsia chinensis - Liquid wax is obtained |
| D. | Psophocarpus tetragonolobus - Seeds are nutritive |
| Answer» B. Leucaena leucocephala - Fixes atmospheric nitrogen | |
| 4839. |
Triticale is used |
| A. | For bread making |
| B. | For forage |
| C. | As medicine |
| D. | None of these |
| Answer» C. As medicine | |
| 4840. |
An underutilized plant which grows in deserts of Mexico and commonly called ?hohoba? is |
| A. | Psophocarpus tetragonolobus |
| B. | Simmondsia chinensis |
| C. | Leucaena leucocephala |
| D. | Parthenium argentatum |
| Answer» C. Leucaena leucocephala | |
| 4841. |
Which one is beverage plant |
| A. | Ilex paraguriensis |
| B. | Catha edulis |
| C. | Poullinia cupana |
| D. | All the above |
| Answer» E. | |
| 4842. |
A plant for social forestry is [Pb. PMT 1999] |
| A. | Lucaena |
| B. | Borassus |
| C. | Mangifera |
| D. | Rosa grandiflora |
| Answer» B. Borassus | |
| 4843. |
Hevea rubber belongs to [CPMT 1986] |
| A. | Malayasia |
| B. | Peruvian Andes |
| C. | Brazil |
| D. | South east Asia |
| Answer» D. South east Asia | |
| 4844. |
An under-utilised oil crop is [AFMC 1986] |
| A. | Brassica campestris |
| B. | Cocos nucifera |
| C. | Helianthus annuus |
| D. | Azadirachta indica |
| Answer» E. | |
| 4845. |
Which of the following is underutilized oil crop |
| A. | Brassica campestris |
| B. | Cocos nucifera |
| C. | Azadirachta indica |
| D. | None of these |
| Answer» D. None of these | |
| 4846. |
Cola, the common beverage, is obtained from |
| A. | Seeds |
| B. | Flowers |
| C. | Leaves |
| D. | Stems |
| Answer» B. Flowers | |
| 4847. |
Jojoba yields wax for cosmetics from its |
| A. | Stem |
| B. | Leaves |
| C. | Seeds |
| D. | Fruit pulp |
| Answer» D. Fruit pulp | |
| 4848. |
The common name of Leucaena leucocephala is [AMU 1996] |
| A. | Guayule |
| B. | Babul |
| C. | Sissoo |
| D. | Subabul |
| Answer» E. | |
| 4849. |
A fast growing small leguminous tree whose leaves being rich in nitrogenous compounds are a good green manure is |
| A. | Dalbergia |
| B. | Leucaena |
| C. | Guayule |
| D. | Jojoba |
| Answer» C. Guayule | |
| 4850. |
Underutilized oil crop is |
| A. | Azadirachta indica |
| B. | Shorea robusta |
| C. | Madhuca indica |
| D. | All of these |
| Answer» E. | |