A sequence of three nucleotides (specially the bases)called a codon is found on

Question

A sequence of three nucleotides (specially the bases)called a codon is found on what molecule? Select one: a. DNA b. mRNA c. tRNA d. rRNA e. uRNA DNA structure is described as a twisted ladder (or helix). Imagine you are climbing a DNA molecule, just as if you were climbing a ladder. What parts of a nucleotide would you be stepping on as you climb? (What are the rungs of the DNA molecule made of) Select one: a. the sugars (deoxyribose) b. the phosphates c. the bases d. sugars and phosphates e. water DNA: T A C A T A G C C T A G C A T Select one: a. A T G T A T C G G A T C G T A b. A T G C G C T A A G C T A C G c. A U G U A U C G G A U C G U A d. A U G A U A C G G U A C G A U e. U A G U T U C G G U T G C U T Use the mRNA table from your book or lab manual to decipher the correct sequence of amino acids this strip of mRNA (answer from above question) would code for, reading from left to right on the mRNA strand. Select one: a. methionine, tyrosine, arginine, isoleucine, valine b. tyrosine, isoleucine, arginine, tyrosine, valine c. methionine, valine, tyrosine, arginine, isoleucine d. methionine, cysteine, methionine, glutamine, proline e. serine, proline, cysteine, tyrosine, valine How is the genetic information encoded in DNA? Select one: a. In the sequence of the nucleotides b. In the number of the nucleotides c. In the length of the molecule d. In the sugar and phosphates e. There is no genetic information in DNA

Explanation / Answer

1.Correct answer is : b.mRNA

Reason:mRNA contains the codons that code for aminoacids.

2.Correct answer is:c.the bases

Reason: The four bases; A,T,G and C form the rungs of DNA molecule.

3.Correct answer is : c.AUG UAU CGG AUC GUA

Reason: Above sequence isa mRNA transcribed from the given DNA sequence.

4.Correct answer is: a.methionine,tyrosine, arginine, isoleucine ,valine

Reason: Above is the correct aminoacid sequence for the mRNA.

5.Correct answer is :a.In the sequence of the nucleotides.

Reason:The sequence of nucleotides determine the genetic information.

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