17. The most consequential nucleotide in an amino acid codon is the last nucleot

Question

17. The most consequential nucleotide in an amino acid codon is the last nucleotide a. b. c. d. e. True False Both a and b Both a and b are incorrect None of the above is true are correct 18. Which of the following is NOT a gene podr? a) Fruits b) Vegetable c) Meat and poultry d) Hair e) All are gene products 19. A codon consist of 3 nucleotidesequence? a. True b. False c. Both a and b are correct d. Both a and b are incorrect e. None of the above is true 20. The Y chromosome contains more genetic information than the X chromosome (not reviewed) a. This is true statement as the Y determines the sex of the child b. This is false statement as they both are equal size and equalgenes c. This is true as the share size of Y over X make this point obvious d. This is false as the share size of X over Y contradicts the statement e. I have no clue as I was absent from lecture on the day this was discussed 21. Messenger RNA (mRNA) must have one termination sequence to end protein synthesis (not reviewed) a) True b) False c) Both a and b are correct d) Both a and b are incorrect e) None of the above is true 22. Another difference between RNA and DNAis? a. RNA has a Thymine (T) nucleotide while DNA has Uracil (U) b. DNA has Thymine fFnucleotide-while RNA-has Uracil(U) c. Both a and b answer are wrong d. Both a and b could be correct e. None of the above is true

Explanation / Answer

17)the most consequential nucleotide in an amino acid codon is last nucleotide

False b

The last codon is least significant it is also called wobble codon.The first two bases are most important.the last codon is least significant.according to genetic code cell would need trnas of 61 different anticodons to compliment with 61 codons available .at this position Us may be read as G in anticodon.

18)e all are gene products.

All of them are derived from living things all of them are considered to be derived from gene.Each of them have their own genetic information.

19)a

A codon consists sequence of three nucleotide s.A codon consists of sequence of three nucleotide s .this codons form genetic code.a codon forms a unit of dna or rna.they are triplet s.

20)c

The statement is false as shape and size of x over y contraindicates the statement.the x chromosome contains 156 million base pairs while y chromosome contains only 57 million base pairs.x chromosome contains majority of genetic information while y chromosome contains sex determination capability.

21) a

True

Messenger rna must have one termination sequence to end protein synthesis.

A termination sequence is always required to end protein synthesis.a stop codon codes for termination of transcription.which is a method of protein synthesis.

22)b

Dna has thymine nucleotide while rna has uracil

Dna is much more stable than rna because of uracil .uracil is highly reactive.uracil is present only in rna

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