Bio 1 Unit 2 Review

Which organelle would you expect to find in plant cells but not animal cells?

• mitochondrion

• ribosome

• chloroplast

• smooth ER

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A protein is being assembled when

• DNA is being translated

• RNA is being transcribed

• RNA is being translated.

• DNA is being transcribed.

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Because of base pairing in DNA, the percentage of

• adenine molecules in DNA is about equal to the percentage of guanine molecules.

• thymine molecules in DNA is about equal to the percentage of adenine molecules

• adenine molecules in DNA is much greater than the percentage of thymine molecules.

• cytosine molecules in DNA is much greater than the percentage of guanine molecules.

Which of the following is NOT a function of proteins?

• store and transmit genetic information

• help to fight disease

• control the rate of reactions

• move substances into or out of cells

Which of the following is true?

• RNA is usually single-stranded.

• DNA is usually single-stranded.

• DNA contains uracil.

• RNA contains thymine.

There are 64 codons and 20 amino acids. Which of the following is true?

• Several different codons can specify the same amino acid.

• Each codon specifies a different amino acid.

• Some amino acids have no link to a codon.

• Each amino acid is specified by only one codon

In eukaryotes

• Transcription takes place in the cytoplasm, and translation takes place in the nucleus

• Transcription takes place in the nucleus, and translation takes place in the cytoplasm.

• Transcription and translation both take place in the nucleus

• Transcription and translation both take place in the cytoplasm.

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Which of the following is a nucleotide found in DNA?

• adenine + phosphate group + thymine

• cytosine + phosphate group + guanine

• deoxyribose + phosphate group + polymerase

• deoxyribose + phosphate group + cytosine

Which sequence correctly traces the path of a protein in the cell?

• ribosome, endoplasmic reticulum, Golgi apparatus

• ribosome, endoplasmic reticulum, chloroplast

• endoplasmic reticulum, lysosome, Golgi apparatus

• ribosome, Golgi apparatus, endoplasmic reticulum

Figure 12–2 shows the structure of

• a DNA molecule.

• an amino acid.

• a RNA molecule.

• a protein

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