8th grade Topic 4 Lesson 3
Quiz by Alesha Jackson
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- Q1
What is the first step in protein synthesis?
mRNA moves to the cytoplasm.
DNA is unzipped in the nucleus.
A ribosome attaches to the mRNA.
tRNA brings amino acids to the mRNA.
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What happens when DNA is replicated?
A chromosome with two identical DNA strands is formed.
A gene with two identical DNA strands is formed.
Genes are copied directly from one cell to another.
A chromosome with two identical RNA strands is formed.
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What is true of all genes?
They use the same kinds of mRNA during protein synthesis.
They use different kinds of tRNA during protein synthesis.
They use different kinds of mRNA during protein synthesis.
They use the same kinds of tRNA during protein synthesis.
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Contains ribose sugar.
DNA
RNA
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DNA and RNA use the same kind of nitrogen bases.
False
True
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What do cells build using DNA code?
Sugars
Genes
Proteins
Chromosomes
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What is the first step of DNA replication?
DNA unzips using a protein.
DNA untwists
DNA copies itself.
Nitrogen bases pair up with each of the bases.
20sEditDelete - Q8
Which one of these is NOT a way an error can occur during DNA replication?
Adding protein bases
Changing the order of nitrogen bases.
Leaving out nitrogen bases
Adding nitrogen bases
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