Chapter 6 - Biology

The molecule that cells use to temporarily store energy is ___________.

• adenosine triphosphate
• glucose
• adenosine diphosphate
• chlorophyll

Why can’t cells directly use the energy from glucose?

• Glucose has too little energy

• Cells cannot digest glucose

• Glucose has too much energy

• Glucose contains only single bonds

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Why do cells have a continuous supply of ATP?

• Cells store more ATP than they can use.

• Phosphate and water combine to make more ATP.

• ATP molecules can be used to store energy repeatedly.

• ADP is recycled to make more ATP.

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Nucleic acids such as DNA and RNA store ___________.

• energy
• protein
• information
• glucose

Which part(s) of a nucleotide is different in each of the five kinds of nucleotide found in DNA or RNA?

• phosphate group

• nitrogenous base

• sugar

• all of these

The two sides of the DNA “ladder” are held together by ___________.

• the attraction of opposite charges
• hydrogen bonds
• peptide bonds
• covalent bonds

In a DNA molecule, adenine always bonds to ___________.

• thymine
• cytosine
• guanine
• uracil

Proteins are made by

• copying other protein molecules.

• assembling chains of codons.

• using information stored in DNA.

• all of these.

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The cellular organelle that reads an RNA strand and assembles amino acids into a protein is the ___________.

• mitochondrion
• leucoplast
• Golgi apparatus
• ribosome

A transfer RNA aligns its amino acid in the proper sequence by matching its __________ to the corresponding codon on the messenger RNA.

• ribosomal RNA

• nuclear pore

• anticodon

• exon