Unit 2 Genetics and Heredity Review

How does RNA differ from DNA?

• RNA contains uracil and deoxyribose
• RNA contains ribose and thymine
• RNA contains uracil and ribose
• RNA contains adenine and ribose

How would the DNA sequence GCTATA be transcribed to mRNA?

• GCUAUA
• CGATAT
• CGAUAU
• GCUTUT

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In messenger RNA, each codon specifies (codes for) a particular

• nucleotide

• enzyme

• amino acid

• promoter

The main function of tRNA is to...

• carry a message that, when translated, forms proteins

• form a portion of ribosomes

• string together complementary RNA and DNA strands

• bring amino acids from the cytoplasm to the ribosomes for building a protein

Use your codon chart. Which amino acid results from the mRNA codon GCA?

• alanine

• tryptophan

• leucine

• serine

In RNA, Uracil pairs with ______.

• Cytosine

• Adenine

• Guanine

• Thymine

The process of making an mRNA copy of a gene in the DNA is called_______

• translation

• transcription

• replication

• mutation

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The process of making a protein from mRNA is called ____

• transcription

• rRNA

• replication

• translation

What is the location in the cell where translation occurs?

• nucleus

• mitochondria

• ribosome

• chloroplast

DNA holds the code for

• lipids
• carbohydrates
• protein
• sugar

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