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.
| 7451. |
Hypersensitivity towards any foreign material or particle is known as |
| A. | Hypergenital disease |
| B. | Congenital disease |
| C. | Cancer |
| D. | Allergy |
| Answer» E. | |
| 7452. |
?Central Plantation Research Institute' is located in |
| A. | Kerala |
| B. | Delhi |
| C. | Bhopal |
| D. | Chandigarh |
| Answer» E. | |
| 7453. |
Full form of IPM is |
| A. | Integrated pest management |
| B. | Integrated programme for malnutrition |
| C. | Indian petroleum management |
| D. | None of the above |
| Answer» B. Integrated programme for malnutrition | |
| 7454. |
Transgenic plants are mainly resistant to |
| A. | Pests |
| B. | Genes |
| C. | Growth |
| D. | Mutation |
| Answer» B. Genes | |
| 7455. |
Stomach poisons are those |
| A. | When injected are harmful |
| B. | When inhaled and injected are harmful |
| C. | Which reach the stomach along with food |
| D. | a and c both |
| Answer» D. a and c both | |
| 7456. |
Pesticides disturb the ecosystem by eliminating the |
| A. | Micro-organism of crop |
| B. | Organisms which form the food chain |
| C. | Organisms which protect the environment |
| D. | None of the above |
| Answer» C. Organisms which protect the environment | |
| 7457. |
Which one is pest [MH-CET 2004] |
| A. | Mouse |
| B. | Pathogen |
| C. | Insect |
| D. | All of these |
| Answer» E. | |
| 7458. |
The pesticides are the chemicals that kill [KCET 1993] |
| A. | Weeds |
| B. | Mites |
| C. | Insects |
| D. | All of these |
| Answer» E. | |
| 7459. |
Most effective pesticides are [Bihar PMT 1988] |
| A. | Carbamates |
| B. | Organochlorines |
| C. | Organophosphates |
| D. | All the above |
| Answer» D. All the above | |
| 7460. |
Mostly pesticides are |
| A. | Useful |
| B. | Harmful |
| C. | Beneficial |
| D. | All the above |
| Answer» E. | |
| 7461. |
Pyrethoids are of |
| A. | Synthetic origin |
| B. | Plant origin |
| C. | a and b both |
| D. | Animal origin |
| Answer» C. a and b both | |
| 7462. |
DDT and 2, 4-D were Introduced |
| A. | Towards end of World War II |
| B. | Towards beginning of World War II |
| C. | During World War I |
| D. | Just after the World War I |
| Answer» B. Towards beginning of World War II | |
| 7463. |
Which ingredient killed hundreds of people in Bhopal gas tragedy [BHU 1988; CBSE PMT 1990, 99; DPMT 1990; AMU 1991; Orissa JEE 1997] |
| A. | Carbon tetrachloride |
| B. | Nitrous acid |
| C. | Mustard gas |
| D. | Methyl isocyanate |
| Answer» E. | |
| 7464. |
Which of the following is a herbicide |
| A. | Allethrin |
| B. | Triazine |
| C. | Aldrin |
| D. | BHC |
| Answer» C. Aldrin | |
| 7465. |
Bordeaux mixture was discovered by [MP PMT 1989, 92; BHU 1997] |
| A. | Millardet |
| B. | Bordeaux |
| C. | David |
| D. | Harrison |
| Answer» B. Bordeaux | |
| 7466. |
The pesticide used in public health programmes |
| A. | BHC |
| B. | Flit |
| C. | Baygon |
| D. | Tik-20 |
| Answer» B. Flit | |
| 7467. |
As insecticides reach at higher trophic level in food chain their concentration [MP PMT 2003] |
| A. | Increases |
| B. | Become irregular |
| C. | Remain constant |
| D. | Decreases |
| Answer» B. Become irregular | |
| 7468. |
First commercial pesticide was [RPMT 1998] |
| A. | DDT |
| B. | 2,4-D |
| C. | Burgandy mixture |
| D. | Bordeaux mixture |
| Answer» E. | |
| 7469. |
Pesticide is |
| A. | Food grain preservative |
| B. | Fungus killer |
| C. | Insect killer |
| D. | b and c both |
| Answer» E. | |
| 7470. |
Property of a codon for always coding a specific amino acid is called |
| A. | Degenerate |
| B. | Non-ambiguous |
| C. | Non-overlapping |
| D. | None of the above |
| Answer» C. Non-overlapping | |
| 7471. |
Assumption that genetic code is a triplet was suggested by [BHU 1984, 87] |
| A. | Gamow |
| B. | Beadle and Tatum |
| C. | S. Brenner |
| D. | Nirenberg and Matthaei |
| Answer» B. Beadle and Tatum | |
| 7472. |
Diamond code proposal was made by |
| A. | Watson |
| B. | Nirenberg |
| C. | Gamow |
| D. | Stahl |
| Answer» D. Stahl | |
| 7473. |
Genetic code consists of [AFMC 1993; CBSE PMT 1988] |
| A. | 4 codons, each with two nucleotides |
| B. | 16 codons, each with four nucleotides |
| C. | 64 codons, each with two nucleotides |
| D. | 64 codons, each with three nucleotides |
| Answer» E. | |
| 7474. |
Anticodon is [CBSE PMT 1995] |
| A. | Paired triplet of bases on messenger RNA |
| B. | Unpaired triplet of bases on rRNA |
| C. | Paired triplet of bases on rRNA |
| D. | An unpaired triplet of bases in an exposed position of tRNA |
| Answer» E. | |
| 7475. |
Jacob and Monad studied lactose metabolism in E. coli and proposed operon concept, which is applicable for [CBSE PMT 2002] |
| A. | Prokaryotes |
| B. | Eukaryotes |
| C. | Protozoanes |
| D. | All of these |
| Answer» B. Eukaryotes | |
| 7476. |
Genetic code translates the language of [AMU 1989] |
| A. | RNA into that of proteins |
| B. | Proteins into that of RNA |
| C. | Amino acids into that of RNA |
| D. | RNA into that of DNA |
| Answer» B. Proteins into that of RNA | |
| 7477. |
Triplet codon in genetics is [Wardha 2005] |
| A. | Fixed |
| B. | Degenerate |
| C. | Ambiguous |
| D. | Non-wobbly |
| Answer» C. Ambiguous | |
| 7478. |
Which one of the following is common to both prokaryotes and eucaryotes [Kerala CET 2005] |
| A. | Mitotic apparatus |
| B. | Histones |
| C. | Mitochondira |
| D. | Genetic code |
| E. | Endoplasmic reticulum |
| Answer» E. Endoplasmic reticulum | |
| 7479. |
In a given DNA segment ATGACC AGG ACC CCA ACA, the first base gets mutated. The effect of this on coding by this DNA segment will result in [Kerala CET 2005] |
| A. | Complete change in the type as well as sequence of amino acids |
| B. | Change in the first amino acid only |
| C. | No change in the squence |
| D. | One amino acid less in the protein |
| E. | No coding |
| Answer» C. No change in the squence | |
| 7480. |
In the lac operon, the structural genes are switched off when [Kerala CET 2005] |
| A. | Repressor binds to operator |
| B. | Repressor binds to promotor |
| C. | Repressor binds to regular |
| D. | Repressor binds to inducer |
| E. | Repressor binds to allolactose |
| Answer» B. Repressor binds to promotor | |
| 7481. |
Terminator gene [BHU 2005] |
| A. | Help in terminating flowering |
| B. | Help in terminating seed germination |
| C. | Used in hybridisation |
| D. | None of these |
| Answer» C. Used in hybridisation | |
| 7482. |
In lac operon model; repressor protein binds to which site [Manipal 2005] |
| A. | Regular |
| B. | Promotor |
| C. | Operator |
| D. | Structural genes |
| Answer» D. Structural genes | |
| 7483. |
In a double stranded DNA, the sequences of base pairs in one strand are AGCTAAGCC. What?s the complementary sequence on the other strand [BVP 2004] |
| A. | TCGATTCGG |
| B. | CGUAUUCG |
| C. | AGCTAAGC |
| D. | CAUTAUCG |
| Answer» B. CGUAUUCG | |
| 7484. |
Code of m-RNA and proteins are [DPMT 2004] |
| A. | Coplanar |
| B. | Colinear |
| C. | Nonlinear |
| D. | Irregular |
| Answer» C. Nonlinear | |
| 7485. |
Operon is [Kerala PMT 2004] |
| A. | A set of closely linked genes regulating a metabolic pathways in prokaryotes |
| B. | The sequence of three nitrogen bases determining a single amino acid |
| C. | The sequence of nitrogen bases in mRNA which codes for a single amino acid |
| D. | A gene responsible for switching on or off other genes |
| E. | A segment of DNA specifying one polypeptide chain in protein synthesis |
| Answer» B. The sequence of three nitrogen bases determining a single amino acid | |
| 7486. |
The codons causing chain termination are [CBSE PMT 1997; BVP 2001, 02; Kerala CET 2003; MHCET 2003; Pb. PMT 2004] |
| A. | TAG, TAA, TGA |
| B. | GAT, AAT, AGT |
| C. | AGT, TAG, UGA |
| D. | UAG, UGA, UAA |
| Answer» E. | |
| 7487. |
In the lactose operon of Escherichia coli, what is the function of promoter |
| A. | Binding of Gyrase enzyme |
| B. | Binding of RNA polymerase |
| C. | Codes for RNA polymerase |
| D. | Processing of messenger RNA |
| Answer» C. Codes for RNA polymerase | |
| 7488. |
A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid [CBSE PMT 2004] |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 7489. |
A naturally occurring coding strand composed of alternating C and U residues would result in the formation of [Kerala PMT 2004] |
| A. | A polypeptide containing alternating leu and ser residues |
| B. | A polypeptide containing either leu or ser residues |
| C. | A polypeptide containing only leu residues |
| D. | A polypeptide containing only ser residues |
| E. | A polypeptide containing only phe residues |
| Answer» B. A polypeptide containing either leu or ser residues | |
| 7490. |
Which one of the following pairs is correctly matched [Kerala PMT 2004] |
| A. | Ribosomal RNA-carries aminoacids to the site of protein synthesis |
| B. | Transcription-process by which protein is synthesized |
| C. | Translation-process by which \[mRNA\] carries the information from nucleus to the ribosome |
| D. | Anticodon-site of tRNA molecule that contains complementary bases to the triple code on the RNA |
| E. | Cistron-is a unit of mutation |
| Answer» E. Cistron-is a unit of mutation | |
| 7491. |
Identify the correct match between the codons and coding functions. [Kerala PMT 2004] Column IColumn IIA.AUG1. PhenylalanineB.UAA2. MethionineC.UUU3. TryptophanD.UGG4. Termination |
| A. | A-1, B-4, C-2, D-3 |
| B. | A-2, B-4, C-1, D-3 |
| C. | A-4, B-3, C-2, D-1 |
| D. | A-4, B-1, C-3, D-2 |
| E. | A-2, B-3, C-4, D-1 |
| Answer» C. A-4, B-3, C-2, D-1 | |
| 7492. |
Which one of the following codons codes for the same information as UGC [AIIMS 2003] |
| A. | UGU |
| B. | UGA |
| C. | UAG |
| D. | UGG |
| Answer» B. UGA | |
| 7493. |
Out of 64 codons, 61 codons code for 20 types of amino acid. It is called [CBSE PMT 2002] |
| A. | Wobbling of codon |
| B. | Overlapping of gene |
| C. | Universility of codons |
| D. | Degeneracy of genetic code |
| Answer» E. | |
| 7494. |
Wobble hypothesis was given by [AIIMS 2002] |
| A. | R. W. Holley |
| B. | H. G. Khorana |
| C. | M. Nirenberg |
| D. | F. H. C. Crick |
| Answer» E. | |
| 7495. |
Genes express their character by forming |
| A. | Enzymes |
| B. | Carbohydrates |
| C. | Fats |
| D. | Vitamins |
| Answer» B. Carbohydrates | |
| 7496. |
Genes that are involved in turning on or off the transcription of a set of structural genes are called [CBSE PMT 1998] |
| A. | Polymorphic genes |
| B. | Operator genes |
| C. | Redundant genes |
| D. | Regulatory genes |
| Answer» C. Redundant genes | |
| 7497. |
Pleitrophy is a condition in which a single gene [AMU 2005] |
| A. | Controls only one phenotype |
| B. | Controls more than one phenotype |
| C. | Does not control any phenotype |
| D. | None of these |
| Answer» C. Does not control any phenotype | |
| 7498. |
In Operon concept, regulator gene functions as [CBSE PMT 1999; KCET 2004] |
| A. | Repressor |
| B. | Regulator |
| C. | Inhibitor |
| D. | All of these |
| Answer» B. Regulator | |
| 7499. |
Which of the following bases is absent in the coding dictionary |
| A. | Uracil |
| B. | Thymine |
| C. | Cytosine |
| D. | Adenine |
| Answer» C. Cytosine | |
| 7500. |
'Operon model' for gene regulation in bacteria was proposed by |
| A. | Jacob and Monad |
| B. | Barry Commoner |
| C. | Crick |
| D. | Watson and Crick |
| Answer» B. Barry Commoner | |