Which of the following demonstrates the central dogma of molecular biologists?(1 point)
Responses
Proteins replicate DNA which gives the expression of traits to an organism.
Proteins replicate DNA which gives the expression of traits to an organism.
DNA and RNA hold the code to create proteins that are the key to gene expression.
DNA and RNA hold the code to create proteins that are the key to gene expression.
Gene expression relies on environmental factors that determine which traits are dominant.
Gene expression relies on environmental factors that determine which traits are dominant.
DNA and RNA mutate into either harmful or helpful effects on the human body.
DNA and RNA hold the code to create proteins that are the key to gene expression.
Look at the DNA sequence.
C G T T A C T G C A A T
G C A A T G A C G T T A
Which sequence shows a substitution mutation?
(1 point)
Responses
C G T C T A C T G C A A T
G C A G A T G A C G T T AC G T C T A C T G C A A T G C A G A T G A C G T T A
C G T G A C T G C A A T
G C A C T G A C G T T AC G T G A C T G C A A T G C A C T G A C G T T A
C G T A C T G C A A T
G C A T G A C G T T AC G T A C T G C A A T G C A T G A C G T T A
C G T T A C T G C A A T
G C A A T G A C G T T AC G T T A C T G C A A T G C A A T G A C G T T A
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The sequence that shows a substitution mutation is:
C G T G A C T G C A A T
G C A C T G A C G T T A
tella described protein synthesis as a process that makes the necessary proteins for the human body to function. She explained the process in the following steps.
DNA is transcribed into mRNA.
Amino acids form a chain.
The amino acid chain is folded into a protein in the endoplasmic reticulum.
What step did Stella miss in her explanation?
(1 point)
Responses
mRNA is translated into amino acids.
mRNA is translated into amino acids.
Polypeptide chains express gene traits.
Polypeptide chains express gene traits.
tRNA delivers the DNA to the ribosome.
tRNA delivers the DNA to the ribosome.
DNA is replicated into two daughter cells.
DNA is replicated into two daughter cells.
The step that Stella missed in her explanation is:
mRNA is translated into amino acids.
The correct answer is:
DNA and RNA hold the code to create proteins that are the key to gene expression.
Which of the following best describes how a liver cell and skin cell have the exact same DNA sequence and yet look different and perform different functions?(1 point)
Responses
The tRNA uses a different sequence in each cell during transcription.
The tRNA uses a different sequence in each cell during transcription.
The cells discard the DNA that is not in use.
The cells discard the DNA that is not in use.
The proteins are expressed differently in each cell.
The proteins are expressed differently in each cell.
The cells mutate during transcription.
The cells mutate during transcription.
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