Protein Synthesis Answers

15 verified answers
6

Explain the process of transcription.

Answer:

During transcription, the gene’s DNA unwinds and unzips. RNA nucleotides pair with the exposed DNA bases, and bonds form to create an mRNA strand. The mRNA then separates from the DNA and moves to the cytoplasm.

7

Check your understanding. Which items did you include? Check all that apply.

A
The gene coding for the protein untwists and unzips.
B
RNA nucleotides form complimentary base pairs with the DNA bases.
C
Hydrogen bonds and sugar-phosphate bonds form and the mRNA strand is synthesized.
D
mRNA peels off the DNA and moves to the cytoplasm.
8

How are amino acids assembled during translation?

Answer:

mRNA attaches to a ribosome. tRNA molecules bring amino acids to the ribosome, and their anticodons pair with complementary mRNA codons. The ribosome forms peptide bonds between adjacent amino acids to build a protein.

9

Check your understanding. What did you include in your response? Check all that apply.

A
mRNA attaches to the ribosome.
B
tRNA molecules transport amino acids to the ribosome.
C
Anti-codons and codons match up and form complementary base pairs.
D
Peptide bonds form between adjacent amino acids to form the protein.
10

How are the order of codons determined?

A
The DNA sequence determines the order.
B
The RNA sequence determines the order.
C
The number of genes determines the order.
14

Explain how genes are expressed for a particular trait.

Answer:

A gene is expressed when its DNA instructions are transcribed into mRNA. The mRNA carries the code to a ribosome, where it is translated into an amino acid chain. The chain folds into a protein, and the protein contributes to the expression of the trait.

15

What information did you include in your response? Check all that apply.

A
One gene for a particular trait is transcribed from DNA during transcription.
B
The code for the gene is transferred by mRNA to the ribosome for protein production to begin.
C
Proteins are constructed from a polypeptide chain of amino acids.
D
Once the polypeptide chain is constructed, a protein is produced and the trait can be expressed.
17

What is one way scientists are able to study operons in organisms?

A
by studying the number and organization of operons by reading the genome sequence
B
by counting the operons during cell division
C
by studying the operon controls during translation when proteins are constructed
18

What is the purpose of operons in protein synthesis?

A
They transfer the mRNA to the ribosomes for protein production.
B
They unzip the DNA molecule at the beginning of transcription.
C
They contain promoters and operators that determine when a gene is transcribed.

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