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Multiple choice zoology molecular basis of inheritance genome projects human genome project human genome project and dna fingerprinting

Number of genes present in human genome is about

  1. 15,000

  2. 21,000

  3. 27,000

  4. 30,000
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A gene is a distinct sequence of nucleotides forming part of a chromosome.
Most of the genes do not code for proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases. The Human Genome Project estimated that humans have around 21,000 genes.
So, the correct option is '21,000'.
Multiple choice zoology molecular basis of inheritance genome projects human genome project human genome project and dna fingerprinting

A ribotide is made of

  1. Adenine + Deoxyribose + Phosphate

  2. Uracil + Ribose + Phosphate

  3. Thymine + Ribose + Phosphate

  4. Uracil + Deoxyribose + Phosphate
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A ribotide (ribonucleotide) consists of a nitrogenous base (like Uracil in RNA), a ribose sugar, and a phosphate group. Deoxyribose is found in DNA, not RNA.

Multiple choice zoology molecular basis of inheritance genome projects human genome project human genome project and dna fingerprinting

Which ones are degenerate codons ?

  1. UAA, UAG and UGA

  2. GUA, GUG, GCA, GCG and GAA

  3. UUC, UUG, CCU, CAA and CUA

  4. UUA, UUG, CUU, CUC, CUA and CUG

  5. AAC, AAG, GAC and CGG
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Degeneracy means that multiple codons can code for the same amino acid. The set UUA, UUG, CUU, CUC, CUA, and CUG all code for the amino acid Leucine.

Multiple choice zoology molecular basis of inheritance genome projects human genome project human genome project and dna fingerprinting

Choose the wrong statement regarding the observation drawn from Human Genome Project

  1. Repetitive sequences are stretches of RNA

  2. Less than 2% of the genome codes for protein

  3. Chromosome Y has the fewest number of genes

  4. SNPs help in tracing human history

  5. Repetive sequences make up a very large portion of the human genome
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Repetitive sequences are stretches of DNA, not RNA. The other statements regarding the small percentage of protein-coding genes, the low gene count on the Y chromosome, and the utility of SNPs are correct findings from the HGP.