Biology 1320 Exam Two Fall 2012
- 1.Which of the following are not components of the plasma membrane?
- A.
Proteins
- B.
Phospholipids
- C.
Sterols
- D.
Nucleic Acid
- E.
All of these are components
- 2.Which membrane component is involved in cystic fibrosis?
- A.
A recognition protein
- B.
An adhesion protein
- C.
A transport protein
- D.
A communication sugar
- E.
A receptor protein
- 3.The organelle that pinches off portions of its membrane to form a compartment used for storage or transport is the:
- A.
Vesicle
- B.
Mitochondrion
- C.
Chloroplast
- D.
Nucleolus
- E.
Dictyosome
- 4.Hooke was the first to observe cells under a simple microscope in the 1600s because he was looking at:
- A.
Plant cells in which the thick cell wall was clearly visible and reminded him of prison cells
- B.
Flagellated eukaryotic cells that were moving
- C.
Flagellated bacterial cells that were moving
- D.
Egg cells, which can be extraordinarily large
- E.
Cells that were naturally colored
- 5.Which of the following will diffuse across a lipid bilayer?
- A.
Sodium ions
- B.
Potassium
- C.
DNA
- D.
Carbon dioxide
- E.
Glucose
- 6.The RNA in the nucleus leaves through
- A.
Frets
- B.
Ribosomes
- C.
Vessicles
- D.
Nuclear pores
- E.
Thylakoids
- 7.The largest cytoskeletal element is the:
- A.
Actin molecule
- B.
Microfilament
- C.
Microtubule
- D.
Intermediate filament
- E.
Myosin molecule
- 8.The energy for flagellar movement (as in sperm swimming)
- A.
Appears to come from protein polarization
- B.
Comes directly from dictyosomes
- C.
Appears to come from mitochondria
- D.
Endoplasmic reticuli
- E.
Comes directly from oxygen
- 9.You received all of your mitochondria from
- A.
Dad
- B.
Plants
- C.
Fish
- D.
Mom
- E.
Protozoans
- 10.Probably the most important cross-linkage determining the tertiary structure of many proteins is the:
- A.
Disulfide bridge
- B.
Hydrogen bond
- C.
Ester
- D.
Peptide bond
- E.
None of the above
- 11.In general, the net movement of molecules in a fluid is a response to the
- A.
Electrical gradient
- B.
Energy gradient
- C.
Heat gradient
- D.
Concentration gradient
- E.
Pressure gradient
- 12.Ribonucleic acid differs from deoxyribonucleic acid in that RNA substitutes:
- A.
Ribose for deoxyribose
- B.
Uracil for thymine
- C.
Uracil for cytosine
- D.
Both ribose for deoxyribose AND uracil for thymine
- E.
Both ribose for deoxyribose AND uracil for cytosine
- 13.A white blood cell engulfing a bacterium is an example of _____.
- A.
Receptor-mediated endocytosis
- B.
Exocytosis
- C.
Pinocytosis
- D.
Facilitated diffusion
- E.
Phagocytosis
- 14.The system of canals, tubes, and sacs that transports molecules inside the cytoplasm is the:
- A.
Golgi bodies
- B.
Ribosomes
- C.
Vesicles
- D.
Lysosomes
- E.
Endoplasmic reticulum
- 15.Lysosomes contain _____ enzymes.
- A.
Synthesis
- B.
Digestive
- C.
Photosynthetic
- D.
Growth
- E.
Respiration
- 16.What is a role of proteins found in eukaryotic plasma membranes:
- A.
Copying DNA
- B.
Regulating the flow of materials through the membrane
- C.
Building proteins
- D.
Immune system action
- E.
All of the above
- 17.Organisms sometimes need sulfur for synthesis of:
- A.
Nucleotides
- B.
Ribosomes
- C.
Protein
- D.
Fats and oils
- E.
Phospholipids
- 18.In a lipid bilayer, _____ of lipid molecules are sandwiched between _______.
- A.
The two unit membanes
- B.
Hydrophilic tails; hydrophobic heads
- C.
Hydrophilic heads; hydrophilic tails
- D.
Hydrophobic tails; hydrophilic heads
- E.
Hydrophobic heads; hydrophilic tails
- 19.The stacks of coin-shaped (mint-like) double membranes found in chloroplasts are
- A.
Frets
- B.
Plasma membranes
- C.
Vacuolar membranes
- D.
Golgi bodies
- E.
Grana
- 20.
- What is the fate of defective or malfunctioning organelles in cells?
- A.
They are broken down by cytoplasmic enzymes
- B.
They are exported by exocytosis
- C.
They are stored in plastids
- D.
They accumulate in the cytoplasm, eventually resulting in cell death
- E.
They are broken down by lysosomal digestive enzymes
- 21.Which of the following is/are not required for cell function since prokaryotes do not have them?
- A.
A plasma membrane
- B.
Transport mechanisms to bring substances in from outside of the cell
- C.
Mitochondria
- D.
Ribosomes
- E.
DNA
- 22.Which one of the following organelles resembles a bacterium in its size and biochemistry?
- A.
A lyzosome
- B.
The nucleolus
- C.
The endoplasmic reticulum
- D.
A golgi body
- E.
A mitochondrion
- 23.Which organelle below is capable of producing its own protein since it has its own ribosomes?
- A.
Dictyosome
- B.
Lysosome
- C.
Chloroplast
- D.
Microtubule
- E.
None of the above
- 24.Cystic fibrosis
- A.
Develops when a person inherits a single copy of a mutant gene
- B.
Is the most common fatal genetic disorder in the United States
- C.
Can be cured by antibiotics
- D.
Affects primarily mucle cells
- E.
All of these are correct
- 25.A phospholipid has a phosphate-containing head and two fatty acid tails attached to a backbone of
- A.
Nucleic acid
- B.
Glycerol
- C.
Glycogen
- D.
Guanine
- E.
Glucose
Questions: 62 | Attempts: 4600 | Last updated: Jun 23, 2020
-
Sample QuestionBiology is the study of...
Questions: 9 | Attempts: 47436 | Last updated: Oct 6, 2020
-
Sample QuestionA Cell builds it's proteins from the Instructions encoded inits _________?
Questions: 16 | Attempts: 36854 | Last updated: Aug 20, 2021
-
Sample QuestionWhat is the function of a cell wall?
Back to top