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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.
| 7201. |
A pleiotropic gene is one which |
| A. | Affects one character |
| B. | Affects more than one characters |
| C. | (a) and (b) both |
| D. | None of these |
| Answer» C. (a) and (b) both | |
| 7202. |
An albino lady marries a normal man having one gene for albinism. They have 3 daughters and 1 son. The son will be |
| A. | Normal |
| B. | Either normal or albino |
| C. | Half normal half albino |
| D. | Normal in childhood but turns albino on becoming adult |
| Answer» C. Half normal half albino | |
| 7203. |
Edward's syndrome, Patau's syndrome and Down's syndrome are due to [DPMT 1983; MP PMT 1997, 2003; CPMT 1999; Orissa JEE 2005] |
| A. | Mutation due to malnutrition |
| B. | Change in sex chromosomes |
| C. | Change in autosomes |
| D. | Change in both sex chromosomes and autosomes |
| Answer» D. Change in both sex chromosomes and autosomes | |
| 7204. |
A man having Klinefelter's syndrome is [J&K CET 2005; MP PMT 2005] |
| A. | Intersex with secondary sexual characters on the side of female |
| B. | Male with secondary sexual characters of female |
| C. | Female with secondary sexual characters of male |
| D. | Normal fertile male |
| Answer» C. Female with secondary sexual characters of male | |
| 7205. |
The concept of sudden genetic change which breeds true in an organism is visualised in the principle of [NCERT 1976] |
| A. | Natural selection |
| B. | Heredity |
| C. | Variations |
| D. | Mutations |
| Answer» E. | |
| 7206. |
Mating between two individuals differing in genotye to produce genetic variation is called [J&K CET 2005] |
| A. | Domestication |
| B. | Introduction |
| C. | Hybridisation |
| D. | Mutation |
| Answer» D. Mutation | |
| 7207. |
The number of chromosomes in Down's syndrome is [CPMT 1983; CBSE PMT 2005; AFMC 2005; MP PMT 2005] |
| A. | 23rd pair with one less = 45 |
| B. | 21st pair with one more = 47 |
| C. | 17th pair with one more = 47 |
| D. | One extra sex chromosome = 47 |
| Answer» C. 17th pair with one more = 47 | |
| 7208. |
Albinism is [CPMT 1977] |
| A. | Hereditary character |
| B. | Non-hereditary character |
| C. | Sex-linked character |
| D. | Acquired character |
| Answer» B. Non-hereditary character | |
| 7209. |
Turner's syndrome is [BHU 1986; CPMT 1994; MP PMT 1994, 98] |
| A. | XO |
| B. | XX |
| C. | XY |
| D. | XYY |
| Answer» B. XX | |
| 7210. |
The point mutations A to G, C to T, C to G and T to A in DNA are [JIPMER 1993] |
| A. | Transition, transition, transversion and transversion respectively |
| B. | Transition, transversion, transition and transversion respectively |
| C. | Transversion, transversion, transition and transition respectively |
| D. | All four are transition |
| Answer» B. Transition, transversion, transition and transversion respectively | |
| 7211. |
Genotype of a Down's syndrome is [BHU 1986; AIIMS 1993] |
| A. | 45 + XX |
| B. | 44 + XY |
| C. | 44 + XXY |
| D. | 22 + XY |
| Answer» B. 44 + XY | |
| 7212. |
Which of the following disorders is not hereditary [J&K CET 2005] |
| A. | Haemophilia |
| B. | Cataract |
| C. | Sickle-cell anaemia |
| D. | Colour blindness |
| Answer» C. Sickle-cell anaemia | |
| 7213. |
The number of chromosomes in Turner's syndrome is [MP PMT 1990; CBSE PMT 1993] |
| A. | 45 |
| B. | 43 |
| C. | 44 |
| D. | 42 |
| Answer» B. 43 | |
| 7214. |
The monosomic condition in human beings depicted as XO is referred to as [AIIMS 1985, 99; BHU 1983, 85; CPMT 1991; Pb. PMT 2000; JIPMER 2002; MP PMT 2002, 03] |
| A. | Criminal syndrome |
| B. | Down's syndrome |
| C. | Klinefelter's syndrome |
| D. | Turner's syndrome |
| Answer» E. | |
| 7215. |
A person who is trisomic for twenty first pair of chromosomes is [BHU 1990; CPMT 1993, 2000; DPMT 1993; MP PMT 1993] |
| A. | Klinefelter's syndrome |
| B. | Down's syndrome |
| C. | Turner's syndrome |
| D. | None of these |
| Answer» C. Turner's syndrome | |
| 7216. |
Mutation is [MP PMT 1993] |
| A. | Sudden change in morphology |
| B. | Change in characters |
| C. | Change in heritable characters |
| D. | None of these |
| Answer» D. None of these | |
| 7217. |
In Klinefelter's syndrome, what is generally the set of sex chromosome [DPMT 1982; CBSE PMT 1993; CPMT 1994; MP PMT 1994, 98, 2000, 02; AIIMS 2000; Kerala CET 2003; BVP 2003] |
| A. | XX |
| B. | XY |
| C. | XXY |
| D. | XYY |
| Answer» D. XYY | |
| 7218. |
Mongoloid condition is related to or In mongolism a patient shows [DPMT 1982; MP PMT 1995; CBSE PMT 2001] |
| A. | Monosomy |
| B. | Trisomy |
| C. | Nullisomy |
| D. | None of the above |
| Answer» C. Nullisomy | |
| 7219. |
The reduction of one pair of chromosome in human is due to |
| A. | Fusion of two chromosomes into one |
| B. | Elimination |
| C. | Mutation |
| D. | Reproductive isolation |
| Answer» C. Mutation | |
| 7220. |
The reason why some mutations which are harmful do not get eliminated from the gene pool, is that[AIIMS 1984] |
| A. | They have future survival value |
| B. | They are recessive and carried by heterozygous individuals |
| C. | They are dominant and show up more frequently |
| D. | Genetic drift occurs because of a small population area |
| Answer» C. They are dominant and show up more frequently | |
| 7221. |
Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino [CBSE PMT 1998] |
| A. | 1 |
| B. | 0.25 |
| C. | 0.5 |
| D. | 0.75 |
| Answer» C. 0.5 | |
| 7222. |
In order to determine whether variations of a character in a population were genetically controlled, the most appropriate procedure will be to |
| A. | Count chromosomes and find out the variations in number in the population |
| B. | Examine DNA and see if the population shows any variation |
| C. | Measure the variations and see if they are continuous or discontinuous |
| D. | Cross individuals of both extremes and see if the offsprings and parents show the range of variations |
| Answer» E. | |
| 7223. |
Turner's syndrome in human is caused by [CPMT 1990] |
| A. | Autosomal aneuploidy |
| B. | Sex chromosome aneuploidy |
| C. | Polyploidy |
| D. | Point mutation |
| Answer» C. Polyploidy | |
| 7224. |
To be evolutionary successful, a mutation must be [CPMT 1982; AFMC 1985; MP PMT 1996] |
| A. | Germplasm DNA |
| B. | Somatoplasm DNA |
| C. | Cytoplasm |
| D. | RNA |
| Answer» C. Cytoplasm | |
| 7225. |
"Philadelphia chromosome'' is found in the patient suffering from |
| A. | Insomnia |
| B. | Leukaemia |
| C. | Hepatitis |
| D. | Albinism |
| Answer» C. Hepatitis | |
| 7226. |
In human type(s) of interferon present is (are) |
| A. | Leucocytic |
| B. | Fibroblastic |
| C. | Immune interferon |
| D. | All of the above |
| Answer» E. | |
| 7227. |
Which of the following discoveries resulted in a Nobel Prize [CBSE PMT 2003] |
| A. | Genetic engineering |
| B. | X-rays induce sex-linked recessive lethal mutations |
| C. | Cytoplasmic inheritance |
| D. | Recombination of linked genes |
| Answer» C. Cytoplasmic inheritance | |
| 7228. |
The interferon of other animals |
| A. | Cannot be used in human |
| B. | Can be used in human |
| C. | Can only be used in that particular animal |
| D. | [a] and [c] both |
| Answer» E. | |
| 7229. |
Common bacteria used in genetic engineering is [Manipal 2005] |
| A. | E. coli |
| B. | Diplococcus |
| C. | Rhizobium |
| D. | Spirillum |
| Answer» B. Diplococcus | |
| 7230. |
Polymerase chain reaction is most useful in [BHU 2005] |
| A. | DNA synthesis |
| B. | DNA amplification |
| C. | Protein synthesis |
| D. | Amino acid synthesis |
| Answer» C. Protein synthesis | |
| 7231. |
First hormone prepared by genetic engineering is [Manipal 2005] |
| A. | Oxytocin |
| B. | Somatotropin |
| C. | Adrenaline |
| D. | Insulin |
| Answer» E. | |
| 7232. |
The viruses infect the host cells. By the induction of viruses the host cells produce the |
| A. | Antigens |
| B. | Oncogens |
| C. | Interferon |
| D. | Carcinogens |
| Answer» D. Carcinogens | |
| 7233. |
In transgenics, expression of transgene in target tissue is determined by [CPMT 2005] |
| A. | Enhancer |
| B. | Promotor |
| C. | Transgene |
| D. | Reporter |
| Answer» E. | |
| 7234. |
First biochemical to be produced commercially by microbial cloning and genetic engineering is [BHU 2005] |
| A. | Human insulin |
| B. | Penicillin |
| C. | Interferons |
| D. | Fertility factors |
| Answer» B. Penicillin | |
| 7235. |
Southern blotting is done for [Haryana 2005] |
| A. | DNA |
| B. | RNA |
| C. | mRNA |
| D. | Protein |
| Answer» B. RNA | |
| 7236. |
In recombination vector used is [BCECE 2005] |
| A. | Protein |
| B. | Agrobacterium tumefaciens |
| C. | Nucleic acid |
| D. | Cellulose |
| Answer» C. Nucleic acid | |
| 7237. |
A tumour inducing plasmid widely used in the production of transgenic plants is that of [AIIMS 2005] |
| A. | Escherichia coli |
| B. | Bacillus thuringiensis |
| C. | Staphylococcus aureus |
| D. | Agrobacterium tumefaciens |
| Answer» E. | |
| 7238. |
Which of the following is false for BT transgenic plant [BCECE 2005] |
| A. | Disease resistance |
| B. | Prepared by Bacillus thuringiensis |
| C. | It is recombinant type |
| D. | No such plant is known |
| Answer» E. | |
| 7239. |
Find the incorrect statement [Kerala CET 2005] |
| A. | Gene therapy is a genetic engineering technique used to treat diseases at molecular level by replacing defective genes with normal genes |
| B. | Calcitonin is a medically useful recombinant product in the treatment of infertility |
| C. | Bt toxin is a biodegradable insecticide obtained from Bacillus thuringiensis |
| D. | Trichoderma species is a biocontrol agent for fungal diseases of plants Totipotency is the potential ability of a cell to aevelop into a complete plant |
| Answer» C. Bt toxin is a biodegradable insecticide obtained from Bacillus thuringiensis | |
| 7240. |
cDNA probes are copied from the messenger RNA molecules with the help of [AIIMS 2005; CPMT 2005] |
| A. | Restriction enzymes |
| B. | Reverse transcriptase |
| C. | DNA polymerase |
| D. | Adenosine diaminase |
| Answer» C. DNA polymerase | |
| 7241. |
DNA repairing is done by [AFMC 2004; MP PMT 2005; Orissa JEE 2005] |
| A. | Ligase |
| B. | DNA polymerase III |
| C. | DNA polymerase II |
| D. | DNA polymerase I |
| Answer» B. DNA polymerase III | |
| 7242. |
Goeddel and his associates biosynthesised the HGH by genetic engineering by |
| A. | RNA incorporation into E. coli |
| B. | DNA of somatostatin gene incorporated into E. coli near the chromosome containing genes for coding the beta galactosidase |
| C. | Incorporation of DNA of HGH into plasmids of E. coli |
| D. | Incorporation of RNA of HGH into plasmids of E. coli |
| Answer» D. Incorporation of RNA of HGH into plasmids of E. coli | |
| 7243. |
What is the first step in the Southern Blot technique [AIIMS 2004] |
| A. | Denaturation of DNA on the gel for hybridization with specific probe |
| B. | Production of a group of genetically identical cells |
| C. | Digestion of DNA by restriction enzyme |
| D. | Isolation of DNA from a nucleated cell such as the one from the scene of crime |
| Answer» E. | |
| 7244. |
An example of gene therapy is [AIIMS 2004] |
| A. | Production of injectable Hepatitis B vaccine |
| B. | Production of vaccines in food crops like potatoes which can be eaten |
| C. | Introduction of gene for adenosine deaminase in persons suffering from Severe Combined Immuno-deficiency (SCID) |
| D. | Production of test tube babies by artificial insemination and implantation of fertilized eggs |
| Answer» D. Production of test tube babies by artificial insemination and implantation of fertilized eggs | |
| 7245. |
Choose the correct statement with reference to ?Dolly? [Kerala CET 2005] |
| A. | She was created by taking nucleus from unfertilised egg |
| B. | She was created by taking nucleus from udder cell and cytoplasm from unfertilised egg |
| C. | She was created by taking cytoplasm from udder cells and nucleus from fertilised egg |
| D. | She was created in the test tube |
| Answer» C. She was created by taking cytoplasm from udder cells and nucleus from fertilised egg | |
| 7246. |
DNA finger printing technique was first developed by [KCET 2004] |
| A. | Jeffreys, Wilson and Thien |
| B. | Boysen and Jensen |
| C. | Scleiden and Schwann |
| D. | Edward and Steptoe |
| Answer» B. Boysen and Jensen | |
| 7247. |
Identify the plasmid [KCET 2004] |
| A. | AIU I |
| B. | Hind III |
| C. | Eco RI |
| D. | pBr 322. |
| Answer» E. | |
| 7248. |
Restriction endonuclease, an enzyme used in Genetic Engineering is employed for [Kerala PMT 2004] |
| A. | Probing exons |
| B. | Cutting double stranded DNA |
| C. | Cutting single stranded DNA |
| D. | Join strands of DNA |
| E. | Copying DNA strands. |
| Answer» C. Cutting single stranded DNA | |
| 7249. |
Restriction endonucleases [CBSE PMT 2004] |
| A. | Are used for in uitro DNA synthesis |
| B. | Are synthesized by bacteria as part of defense mechanism |
| C. | Are present in mammalian cells for degradation of DNA when the cells dies |
| D. | Are used in genetic engineering for ligating two DNA molecules |
| Answer» C. Are present in mammalian cells for degradation of DNA when the cells dies | |
| 7250. |
DNA fingerprinting refers to [CBSE PMT 2004] |
| A. | Techniques used for molecular analysis of different specimens of DNA |
| B. | Techniques used for identification of fingerprints of individuals |
| C. | Molecular analysis of profiles of DNA samples |
| D. | Analysis of DNA samples using imprinting devices |
| Answer» D. Analysis of DNA samples using imprinting devices | |