Genetics - 10 Basic Questions

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| By Kar
Kar, Assistant Professor (Biochemistry)
Karthikeyan Pethusamy is an assistant professor in the Department of Biochemistry at the All India Institute of Medical Sciences in New Delhi
Quizzes Created: 33 | Total Attempts: 50,084
| Attempts: 118
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  • 1/10 Questions

    Telmerase is a ribonucleoprotein

    • True
    • False
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About This Quiz

This Genetics quiz assesses foundational knowledge in eukaryotic gene expression, DNA modifications, histone structure, and genomic characteristics. It's designed for learners to test their understanding of basic genetic mechanisms and their implications.

Genetics - 10 Basic Questions - Quiz

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  • 2. 

    In Eukaryotes, mRNA is produced by

    • RNA Polymerase I

    • RNA Polymerase II

    • RNA Polymerase III

    • None

    Correct Answer
    A. RNA Polymerase II
    Explanation
    rRNA, mRNA, tRNA respecively

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  • 3. 

    Estimated number of human genes

    • 20 to 25 thousand

    • 50 thousand

    • 60 thousand

    • 1 lakh

    Correct Answer
    A. 20 to 25 thousand
    Explanation
    The estimated number of human genes is 20 to 25 thousand. This is based on current scientific knowledge and research, which suggests that the human genome contains a relatively small number of genes compared to earlier estimations. Advances in genetic sequencing technology and analysis techniques have allowed researchers to refine their understanding of the human genome and identify the actual number of genes present. This estimate is widely accepted in the scientific community.

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  • 4. 

    H1 histone is the highly conserved histone among all the others.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    It is the least conserved. H1 binds to linker DNA.

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  • 5. 

    In mitochondrial mRNA, UGA cods for 

    • Methionine

    • N-formyl methionine

    • Tryptophan

    • None

    Correct Answer
    A. Tryptophan
    Explanation
    AGA, AGG, UAA, UAG are the 4 mitochondrial stop codons.

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  • 6. 

    Number of genes encoded by mitochondrial genome

    • 37

    • 47

    • 57

    • 67

    Correct Answer
    A. 37
    Explanation
    2 rRNA, 22 tRNA, 13 proteins of ETC ===> total 37

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  • 7. 

    Equivalent of pribnow box in eukaryotes is 

    • Hogness box

    • GC box

    • CAAT box

    • None

    Correct Answer
    A. Hogness box
    Explanation
    The Hogness box is the equivalent of the pribnow box in eukaryotes. The pribnow box is a DNA sequence found in prokaryotes that serves as the binding site for RNA polymerase during transcription initiation. Similarly, the Hogness box is a DNA sequence found in eukaryotes that functions as a promoter element for RNA polymerase II. It helps in the initiation of transcription by providing a binding site for transcription factors. Therefore, the Hogness box is the correct answer as it is the equivalent of the pribnow box in eukaryotes.

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  • 8. 

    Restriction enzymes

    • Are produced by viruses

    • Cut only single stranded DNA

    • Can cut the DNA anywhere

    • Restrict the expression of viral DNA

    Correct Answer
    A. Restrict the expression of viral DNA
    Explanation
    that's why they are known as restriction enzymes.

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  • 9. 

    Human haploid genome consists of

    • 1 billion base pairs

    • 2 billion base pairs

    • 3 billion base pairs

    • 4 billion base pairs

    Correct Answer
    A. 3 billion base pairs
    Explanation
    The human haploid genome consists of 3 billion base pairs. This is the correct answer because the haploid genome refers to the set of chromosomes in a gamete, which contains half the number of chromosomes found in a normal body cell. The human genome is diploid, meaning it consists of two sets of chromosomes, one from each parent. Each set contains approximately 3 billion base pairs, resulting in a total of 6 billion base pairs in a diploid genome. Therefore, the haploid genome, which represents only one set of chromosomes, contains 3 billion base pairs.

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  • 10. 

    Deamination of methylated cytosine will produce

    • Uracil

    • Thymine

    • Hypoxanthine

    • Adenine

    Correct Answer
    A. Thymine
    Explanation
    thymine is methylated uracil

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  • Mar 21, 2023
    Quiz Edited by
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  • Jan 24, 2015
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    Kar
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