$$\text{Codon} \rightarrow \text{Amino Acid}$$

Question 1

Given the DNA strand 2 sequence: T A C C A G C G T C C T G C T G T T A G G A C T, what is the complementary DNA strand 1 sequence?

Accepted Answer

A T G G T C G C A G G A C G A C A A T C C T G A

Question 2

What is the mRNA sequence transcribed from DNA strand 2: T A C C A G C G T C C T G C T G T T A G G A C T?

Accepted Answer

A U G G U C G C A G G A C G A C A A U C C U G A

Question 3

Which tRNA anticodon sequence would pair with the mRNA codon sequence: A U G G U C G C A G G A C G A C A A U C C U G A?

Accepted Answer

U A C C A G C G U C C U G C U G U U A G G A C U

Question 4

If the mRNA sequence is A U G G U C G C A G G A C G A C A A U C C U G A, which amino acid sequence is produced?

Accepted Answer

Met-Val-Ala-Arg-Asp-Asp-Asn-Ser-Glu

Question 5

A mutation changes the DNA sequence from T A C to T G C. What is the resulting change in the mRNA codon and amino acid?

Accepted Answer

mRNA: U G C; Amino acid: Cys

Question 6

Which of the following best describes the relationship between DNA, mRNA, tRNA, and amino acids in protein synthesis?

Accepted Answer

DNA is transcribed to mRNA, mRNA is translated by tRNA, and tRNA brings amino acids to form a polypeptide.

Question 7

If a DNA sequence contains the triplet C G T, what is the corresponding mRNA codon and tRNA anticodon?

Accepted Answer

mRNA: G C A; tRNA: C G U

Question 8

A patient has a point mutation in the DNA sequence that changes G C T to G C C. What is the effect on the amino acid sequence?

Accepted Answer

No change; both codons code for Ala

Question 9

Which of the following equations correctly represents the base pairing rules for DNA?

Accepted Answer

$$A = T$$ and $$C = G$$

Question 10

During transcription, which equation represents the conversion of DNA to mRNA?

Accepted Answer

$$A \rightarrow U$$, $$T \rightarrow A$$, $$C \rightarrow G$$, $$G \rightarrow C$$

Question 11

If the mRNA codon is G C U, what is the corresponding tRNA anticodon and amino acid?

Accepted Answer

tRNA: C G A; Amino acid: Ala

Question 12

A DNA sequence is mutated from A G G to A G A. What is the effect on the mRNA codon and the amino acid?

Accepted Answer

mRNA: U C U; Amino acid: Ser

Question 13

Which of the following best explains why a single base change in DNA can have a significant effect on protein function?

Accepted Answer

A single base change can alter the mRNA codon, leading to a different amino acid and potentially changing protein structure and function.

Question 14

If the DNA template strand is C C T, what is the mRNA codon and the amino acid produced?

Accepted Answer

mRNA: G G A; Amino acid: Gly

Question 15

A patient’s DNA sequence is G T T. What is the mRNA codon and the corresponding amino acid?

Accepted Answer

mRNA: C A A; Amino acid: Gln

Question 16

Which of the following is the correct sequence of events in protein synthesis?

Accepted Answer

Transcription of DNA to mRNA, translation of mRNA by tRNA, assembly of amino acids into a polypeptide

Question 17

If a DNA sequence is A C T, what is the mRNA codon and the amino acid produced?

Accepted Answer

mRNA: U G A; Amino acid: Stop

Question 18

Which equation best represents the relationship between codons and amino acids?

Accepted Answer

$$	ext{Codon} ightarrow 	ext{Amino Acid}$$

Question 19

A DNA sequence is mutated from C A G to C A A. What is the effect on the mRNA codon and the amino acid?

Accepted Answer

mRNA: G U U; Amino acid: Gln

Step-by-Step Guidance for DNA, mRNA, tRNA, and Amino Acid Translation

Study Guide - Practice Questions