Bio 181 DNA Structure and Function

What does DNA do?

• a.  It carries genetic codes from biological parents to offspring.

• a.  It carries oxygen from the lungs to the body.
• a.  It tells you who you are.
• a.  It is the powerhouse of the cell.

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Which organelle is DNA usually found in?

• cell membrane
• vacuole
• chloroplast
• nucleus

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How many chromosomes in total do human cells have?

• 46

• 23

• 2

• 44

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Bundled up, organized DNA is called a

• genome

• trait

• chromosome

• nucleotide

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A long molecule in the shape of a double helix and made up of nucleotides; contains genetic information.

• Deoxyribonucleic acid (DNA)

• ribonucleic acid (RNA)

• chromosome

• gene

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The type of weak bond found between the complementary base pairs in a strand of DNA.

• hydrogen bond

• base pair

• nucleotide sequence

• nucleotide

The subunit that makes up DNA; contains a sugar, a phosphate group, and a nitrogenous base.

• nucleotide

• gene

• chromosome

• DNA

Which of the following nitrogenous bases are paired correctly?

• adenine-guanine

• cytosine-thymine

• adenine-thymine

• guanine-thymine

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

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Nucleotides are made up of a sugar, phosphate, and..?

• nitrogenous base
• nucleic acid
• cholesterol
• fatty acid

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