Unit 2 Cell Biology Review
- 1.The enzyme invertase is usually found outside the cells of yeast. the enzyme also has 3 carbohydrates on it. In a particular mutant strain, the carbohydrates are present, but the enzyme is found in the rough ER instead of outside the cell. This mutant is defective in
- A.
Transport from Rough ER to Smooth Er
- B.
Transport from Golgi to the outer membrane
- C.
Transport from the Rough ER to Golgi
- D.
Transport from Rough ER to lysosomes
- 2.Glucose transporters are found in the outer membranes of yeast cells. These proteins have a chain of 5 carbohydrates on them. You have a mutant strain that, like the strain in question 19 has a transport problem. Like the strain in question 19, the protein stays in the Rough ER. However, this protein has 3 carbohydrates on it, not 5. From this data we can conclude
- A.
The additional 2 carbohydrates are normally put on in the Golgi
- B.
The additional 2 carbohydrates are put on in the ER and are needed to get to the Golgi
- C.
The additional 2 carbohydrates are not needed for transport
- D.
We can not conclude any of the above
- 3.Tertiary structure uses the following types of bonds?
- A.
Hydrogen
- B.
Ionic
- C.
Disulfide brdiges
- D.
All of the above
- 4.Which type of structure involves interactions between subunits?
- A.
Quatenary
- B.
Tertiary
- C.
Secondary
- D.
Primary
- 5.Which type a structure only uses covalent bonds?
- A.
Secondary
- B.
Primary
- C.
Quatenary
- D.
Tertiary
- 6.Which type of structure involves only hydrogen bonds?
- A.
Primary
- B.
Quatenary
- C.
Secondary
- D.
Tertiary
- 7.
![- ProProfs]()
- A.
The molecule shown is used mainly for energy
- B.
The molecule shown is part of a membrane
- C.
The molecule shown helps transport ions
- D.
The molecule shown has no biological function
- 8.
![- ProProfs]()
- A.
The molecule shown is a fatty acid
- B.
The molecule shown is a fat
- C.
The molecule shown is a phospholipid
- D.
The molecule shown is a steroid
- 9.Which type of organism would have problems in isotonic media?
- A.
Animal
- B.
Plant
- C.
Animal and Plant
- D.
Neither Plant nor Animal
- 10.Click on the URL http://www.youtube.com/watch?v=tSJ0LnOHpTw The type of transport shown in the video is
- A.
Osmosis
- B.
Facilitated diffusion
- C.
Endocytosis
- D.
None of the above
- 11.An organism has an arrhythmic heart. This might be due to a defect in
- A.
Gap Junctions
- B.
Anchoring Junctions
- C.
Tight Junctions
- D.
Ribosomes
- 12.Which of the following involves receptor mediated endocytosis?
- A.
Vesicles releasing neurotransmitters
- B.
Liquids being taken up from the surrounding fluids
- C.
Ldl being taken up by blood vessel cells
- D.
White blood cells eating bacteria
- 13.Lipids get made in
- A.
The Golgi
- B.
Ribosomes
- C.
Rough ER
- D.
Smooth ER
- 14.Cilia are made of
- A.
Microtubules
- B.
Actin
- C.
Intermediate filaments
- D.
Anchoring Junctions
- 15.Microvilli are thin finger like projections found in intestines and other cells. They are made from
- A.
Microtubules
- B.
Actin
- C.
Intermediate filaments
- D.
None of the above
- 16.
![- ProProfs]()
- A.
The image above was made using Scanning Electron Microscopy
- B.
The image above was made using Transmission Electron Micrscopy
- C.
The image above was made using a light microscope
- D.
The image above was made using the antibody method
- 17.Red blood cells are usually disc shaped. You hypothesize that microfilaments are needed for this shape. Giving cells cytocholasin, a drug that interferes with actin function causes the cells to be spherical. Giving these cells taxol, a drug that interferes with microtubule function has no effect. From these results one can conclude
- A.
Cytocholasin is needed for normal cell shape
- B.
Microtubules are needed for normal cell shape
- C.
Microfilaments are needed for normal cell shape
- D.
. Intermediate filaments have no role in cell shape
- 18.A control in the above experiment would be
- A.
Red blood cells given no drugs
- B.
Red Blood Cells given taxol
- C.
Red Blood Cells given cytocholasin
- D.
Normally round cells given cytocholasin
- 19.A genetic defect in a protein that helps actin fibers form results in low mobility for white blood cells. This is because
- A.
People with the defect get frequent infections
- B.
The cells use a myosin based movement mechanism
- C.
White blood cells help kill bacteria
- D.
Sperm use a flagella based mechanism for movement
- 20.Histone are proteins that are usually found in the nucleus. A mutant histone protein is found in the cytoplasm instead. Analysis of the protein shows that it is missing it's first 3 amino acids. You can explain this result by saying
- A.
The histone is missing a signal sequence needed to get into the cytoplasm
- B.
The histone is missing a signal sequence needed to get into the nucleus
- C.
HIstones are part of the ER complex which is needed to sort proteins
- D.
The first few amino acids are needed for the ribosome to make the protein.
Questions: 40 | Attempts: 438 | Last updated: Feb 18, 2013
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