DEUA 1 Review

What is the basic structural and functional unit of all living organisms?

• Organelle

• Cell

• Tissue

• Atom

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Which of the following best describes a prokaryotic cell?

• Contains a nucleus and membrane-bound organelles

• Lacks a nucleus and membrane-bound organelles

• Contains only mitochondria

• Has a cell wall made of cellulose

What is the main role of enzymes in biological reactions?

• To provide energy

• To speed up chemical reactions

• To store genetic information

• To transport substances

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Which phase of the cell cycle involves the division of the cell’s nucleus?

• G1 phase

• S phase

• G2 phase

• M phase

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Which of the following is NOT considered a biomolecule?

• Protein

• Lipid

• Water

• Nucleic acid

Which structure is found in plant cells but not in animal cells?

• Mitochondria

• Cell wall

• Ribosome

• Plasma membrane

Which statement best explains the endosymbiotic theory?

• Eukaryotic cells evolved from prokaryotic cells by engulfing them

• Prokaryotic cells evolved from eukaryotic cells

• Viruses evolved from bacteria

• Organelles are formed by the cell membrane folding inward

Which of the following is a characteristic of cancer cells?

• Controlled cell division

• Normal cell cycle regulation

• Uncontrolled cell growth

• Undergo apoptosis regularly

Compare the DNA location in prokaryotic and eukaryotic cells.

• Both have DNA in the nucleus

• Prokaryotes have DNA in the cytoplasm; eukaryotes have DNA in the nucleus

• Both have DNA in mitochondria

• Eukaryotes have DNA in the cytoplasm; prokaryotes have DNA in the nucleus

Explain how enzymes affect the activation energy of a chemical reaction.

• Enzymes increase the activation energy

• Enzymes decrease the activation energy

• Enzymes do not affect activation energy

• Enzymes convert activation energy to heat