Biochemistry Questions and Answers – Chromosomal Elements

This set of Biochemistry Multiple Choice Questions & Answers (MCQs) focuses on “Chromosomal Elements”.

1. The lowest level of chromosome organization is _______________
a) Nucleosome
b) Solenoid
c) 30nm fiber
d) None of these
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2. How many autosomes are there in humans?
a) 21 pairs
b) 44
c) 46
d) 48
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3. What proportion of the human genome is made up of repetitive DNA sequences?
a) 15%
b) 1%
c) 90%
d) 50%
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4. The extra chromosomal, self-replicating, double stranded, closed, circular DNA molecules are called ____________
a) Viruses
b) Phages
c) Chloroplasts
d) Plasmids
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5. Which out of the following statements is true about the human genome?
a) The human genome is believed to contain approximately 50,000 protein coding genes
b) All non-protein coding sequences in the genome are believed to be non-functional DNA
c) About 1.6% of the human genome encodes protein sequences
d) Intros are the sections of protein coding genes that actually encode amino acid sequences
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6. Which of the following is false about introns?
a) They are non-protein coding genes
b) They are protein coding genes
c) They are removed by splicing
d) Integral to gene expression regulation
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7. Which of the two organelles contain their own DNA and ribosomes?
a) Mitochondria and chloroplast
b) Endoplasmic reticulum and mitochondria
c) Golgi complex and mitochondria
d) Lysosomes and mitochondria
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8. About what proportion of mitochondrial proteins are encoded by nuclear DNA?
a) More than 95%
b) 50%
c) 1%
d) 1.5%
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9. Short interspersed elements are about ____________
a) 100 to 300 bp long
b) 200 to 400 bp long
c) 10 to 100 bp long
d) 6000 to 8000 bp long
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10. Long interspersed elements are about ____________
a) 100 to 300 bp long
b) 200 to 400 bp long
c) 10 to 100 bp long
d) 6000 to 8000 bp long
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Sanfoundry Global Education & Learning Series – Biochemistry.

To practice all areas of Biochemistry, here is complete set of 1000+ Multiple Choice Questions and Answers.