Quiz - Chapter 1
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1.
Which of the following is NOT in the category of prokaryotes?
A.
Fungi
B.
Bacteria
C.
Rickettsiae
D.
Cyanobacteria
2.
Which of the following is a TRUE statement regarding a eukaryotic cell?
A.
They are smaller than prokaryotes.
B.
They contain organelles.
C.
They lack a nucleus.
D.
They lack histones.
3.
Which of the following is the best description of the function of the histone in the eukaryote?
A.
Cell division
B.
Cell movement
C.
Direction of cell activities
D.
Folding of DNA
4.
Which of the following is another name for the outer membrane of the eukaryotic cell?
A.
Nucleolus
B.
Plasma membrane
C.
Cytoplasm
D.
Cytosol
5.
Which of the following is synthesized in the nucleolus and secreted into the cytoplasm?
A.
Endoplasmic reticulum
B.
Cisternae
C.
Ribosome
D.
Lysosome
6.
Which of the following is the appropriate term for the organelle that is responsible for cellular energy metabolism?
A.
Golgi complex
B.
Mitochondria
C.
Endoplasmic reticulum
D.
Nucleolus
7.
Which of the following is the best description of an amphipathic molecule?
A.
Hydrophobic
B.
Hydrophilic
C.
Hydrophobic and hydrophilic
D.
Nonpolar
8.
Which of the following is NOT a function of a protein?
A.
Pores or transport channels
B.
Enzymes that drive pumps
C.
Cell surface markers
D.
Synapses for cells
9.
Which of the following is an appropriate definition of a cellular receptor?
A.
Located only in the nucleus
B.
Binds with any molecule
C.
Delivers a protein to the cell surface
D.
Binds with ligands
10.
Which of the following is NOT a component of the extracellular matrix?
A.
Collagen
B.
Elastin
C.
Fibronectin
D.
Desmosomes
11.
Which of the following best describes a desmosome?
A.
Is a barrier to diffusion
B.
Holds cells together by continuous bands
C.
Is a communicating tunnel
D.
Functions as a zona occludens
12.
Which of the following terms best describes the following process: "Neurotransmitters diffuse across the synaptic cleft and act on the postsynaptic target"?
A.
Chemical synapse
B.
Paracrine signaling
C.
Autocrine signaling
D.
Autostimulation
13.
Which of the following is NOT a function of signaling cascades?
A.
Transfer signal
B.
Distribute signal
C.
Delete signal
D.
Amplify signal
14.
Which describes the function of a second messenger?
A.
Extracellular ligand that binds with membrane-bound receptors
B.
Intracellular enzyme activated by binding of ligand to cell surface receptors that trigger a cascade of intracellular events
C.
Chemical messenger that opens specific channels in the cell membrane
D.
Chemical messenger that blocks a membrane-bound receptor signal
15.
Which of the following statements regarding cellular energy is correct?
A.
Glycolysis is the building of sugar molecules.
B.
Oxidative cellular metabolism is a single reaction making ATP.
C.
Oxidative phosphorylation occurs in the mitochondria.
D.
Anaerobic glycolysis occurs in the presence of oxygen.
16.
Which of the following is the best description of the term
diffusion
?
A.
Movement of a solute molecule from high to low concentration
B.
Movement of water down a concentration gradient
C.
Movement of water and solute down a concentration gradient
D.
Mechanical pressure of water pushing against the cellular membrane
17.
Which of the following is a TRUE statement?
A.
A hypotonic solution has a lower concentration (more dilute) than body solution.
B.
A hypertonic solution has a lower concentration (more dilute) than body solution.
C.
Osmolality is a measure of the concentration of molecules per volume of solution.
D.
Osmolarity is a measure of the concentration of molecules per weight of water.
18.
What is the appropriate term for "energy-releasing process"?
A.
Anabolism
B.
Catabolism
C.
Substrate
D.
Second messenger
19.
Which of the following is the best definition for the term
chemotaxis?
A.
Second messenger system
B.
Autostimulation
C.
Movement of cells along a chemical gradient
D.
Pass-it-on signal
20.
Which of the following statements regarding transport across membranes is TRUE?
A.
Diffusion requires a significant energy input.
B.
Mediated transport involves a receptor with a high degree of specificity.
C.
Active transport moves molecules down a concentration gradient.
D.
Facilitated transport expends energy.
21.
Which of the following terms best describes the simultaneous movement of two molecules in one direction?
A.
Symport
B.
Antiport
C.
Uniport
D.
Diffusion
Quiz - Chapter 1