Biology Mcqs XI [Chromosomes and Dna] Online Test 3

Biology Mcqs XII [Chromosomes and Dna] MCQS Online Test - 3

Biology Aptitude Test. 10 Questions from Chapter # 20 Chromosomes and Dna

Q1. “DNA is the genetic material in phage, transmitted from one gencration to the next” Is observed by:

• Schielden and shwann
• Hershey and Chase
• Avery, Macleod and McCarty
• F. Griffith
• Karis Correns and Walter Sutton

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Q2. “Molecular model of DNA” was suggested by:

• Watson and Crick
• Hershey and Chase
• Avery, Macleod and McCarty
• F. Griffith
• Correrns and Sutton

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Q3. If the sequence of one chain is ‘ATTGCAT”, the sequence of its partner in the duplex must be:

• TAATGCA
• TACAGCA
• TAACGTA
• TAAGCAT
• TAATGTA

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Q4. The two polynucleotide strands of DNA remain separated by _______ distance:

• 6A°
• 10A°
• 15A°
• 20A°
• 30A°

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Q5. One complete turn of DNA contains:

• 2 nucleotides
• 5 nucleotides
• 10 nucleotides
• 15 nucleotides
• 20 nucleotides

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Q6. Best present in RNA but not in DNA is:

• Adenine
• Guanine
• Cytosine
• Uracil
• All are incorrect

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Q7. To specify an amino acid genetic code was:

• One base
• Two bases
• Three bases
• Four bases
• Five bases

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Q8. DNA is made of billions of units called:

• Nucleosides
• Histones
• Chromosomes
• Nucleotides
• Phosphoric Acid Residues

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Q9. Each nucleotide occupies _______ distance along the length of a polynucleotide strand.

• 10A°
• 20A°
• 24A°
• 30A°
• 15A°

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Q10. Genetic disorder in which urine containing homogentisic acid and turned black on exposure to air is called:

• Hemoglobinuria
• Alkaptonuria
• Homocystinuria
• Proteinuna
• Phenylketonuria

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Chromosomes and Dna Test - 4

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