AP Biology-Cells

Prokaryotes are classified as belonging to two different domains. What are they?

• Bacteria & Protista
• Bacteria & Archaea
• Bacteria & Eukarya
• Archaea & Protista

Plant cells have ___ for cell to cell communication.

• gap junctions
• plasmodesmata
• desmosomes
• tight junctions

Which structure is common to plant and animal cells?

• central vacuole
• chloroplast
• wall made of cellulose
• mitochondrion

Which of the following is major cause of the size limits for certain types of cells?

• evolutionary progression in cell size; more primitive cells have smaller sizes.
• the need for sufficient surface area to support the cell's metabolic needs.
• limitation on the strength and integrity of the plasma membrane as cell size increases
• the difference in plasma membranes between prokaryotes and eukaryotes

White blood cells engulf bacteria through what process?

• pinocytosis
• osmosis
• phagocytosis
• exocytosis

Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?

• glycogen
• cellulose
• proteins
• lipids

A chemical reaction that has a positive ΔG (free energy) is best described as

• entropic
• spontaneous
• endergonic
• exergonic

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following?

• denaturation of the enzyme
• noncompetitive inhibition
• allosteric inhibition
• competitive inhibition

Which of the following would likely move through the lipid bilayer of a plasma membrane most rapidly?

• CO₂
• an amino acid
• starch
• glucose

All of the following are part of a prokaryotic cell except

• a plasma membrane
• DNA
• an endoplasmic reticulum
• ribosomes