In which of the following one may observe variation in DNA?
(1) Fragmentation
(2) Budding
(3) Amitosis
(4) mutation
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyTwo phenotypically normal individuals have an affected child. What can we conclude about the parents?
1. they both carried the diesease allele
2. they are not the parents of the child
3. they are affected
4. no conclusions can be drawn
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAll the following are examples of Mendelian disorders except:
1. Hemophilia
2. Sickle cell anemia
3. Phenylketonuria
4. Down's syndrome
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn Phenylketonuria,
I: | Phenylpyruvic acid and other derivatives are accumulated in brain resulting in mental retardation. |
II: | These are also excreted through urine because of its poor absorption by kidney. |
1. Only I is correct
2. Only II is correct
3. Both are correct
4. Both are incorrect
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following traits are controlled by genes located on the differential part of X-chromosome?
1. Porcupine skin and epidermolysis bullosa
2. Beard in man and milk glands in female
3. Color blindness and hemophilia
4. Color blindness and cystic fibrosis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is not a hereditary disease?
1. Haemophilia.
2. Cretinism.
3. Cystic fibrosis.
4. Thalassemia.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMendelian disorders are mainly determined by:
1. Alteration or mutation in a single gene.
2. Chromosomal gross structural changes.
3. Recombination between linked genes.
4. Jumping genes
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn cases of Phenylketonuria:
1. The affected individual lacks an enzyme that converts the amino acid tyrosine into phenylalanine.
2. The affected individual makes an enzyme that converts the amino acid tyrosine into phenylalanine.
3. The affected individual makes an enzyme that converts the amino acid phenylalanine into tyrosine.
4. The affected individual lacks an enzyme that converts the amino acid phenylalanine into tyrosine.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyHow many diseases in the list given below are Mendelian disorders?
1. Four
2. Five
3. Six
4. Seven
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMatch each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I Disorder |
Column II Feature |
I. Phenylketonuria II. Sickle Cell anemia III. Down's Syndrome IV. Turner's Syndrome |
(i) Rudimentary ovaries (ii) Gynecomastia (iii) Trisomy 21 (iv) Lack of enzyme PAH (v) Lack of tyrosinase (vi) Mutation GAG to GUG (vii) Mutation GUG to GAG |
1. I - v; II - vii; III - iii; IV - i
2. I - iv; II - vi; III - iii; IV - i
3. I - v; II - vi; III - iii; IV - ii
4. I - v; II - vi; III - iii; IV - i
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology