Unit 2 Cell Biology Review

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1. Which type a structure only uses covalent bonds?

Explanation

The primary structure is the sequence of amino acids joined by covalent peptide bonds.

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About This Quiz
Unit 2 Cell Biology Review - Quiz

Explore key aspects of cell biology in the 'Unit 2 Cell Biology Review'. This quiz assesses understanding of protein transport, enzyme structure, and molecular interactions, crucial for students and professionals in biological sciences.

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2.

Explanation

Phospholipids have 2 fatty acid tails and a phosphate group

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3. Cilia are made of

Explanation

Cilia and Flagella have the same arrangement of microtubuoles

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4. A control in the above experiment would be

Explanation

To show that the drug had the effect, you would need to show that not giving the drug had no effect on cell shape. (If the media was slightly hyptonic, the cells might also turn round.)

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5. Tertiary structure uses the following types of bonds?

Explanation

Tertiary structure involves several types of bonding between R groups. It also involves hydrophobic interactions between R groups.

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6. Which type of structure involves only hydrogen bonds?

Explanation

Beta pleated sheets and alpha helices are due to hydrogen bonds between the backbone parts of the amino acids

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7. 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

Explanation

Since the protein is "stuck" in the rough ER, it can not get to the Golgi which is the usual next destination

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8.

Explanation

Phospholipids are the major membrane component

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9. A genetic defect in a protein that helps actin fibers form results in low mobility for white blood cells. This is because

Explanation

All of the above are true but only the fact that the cells use a myosin (and therefore actin) based movement method explain why these cells can not move well.

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10. Which type of structure involves interactions between subunits?

Explanation

Proteins like hemoglobin, which has 4 subunits, use the same type of bonds used in tertiary structure to connect the different polypeptides in a quatenary structure

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11. Lipids get made in

Explanation

The smooth ER helps makes lipids and detoxifies compounds such as alcohols

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12. Click on the URL https://www.youtube.com/watch?v=tSJ0LnOHpTw The type of transport shown in the video is

Explanation

Facilitated diffusion involves proteins

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13.   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

Explanation

The drug interferes with actin (microfilaments) thus preventing normal disc shape

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14. An organism has an arrhythmic heart. This might be due to a defect in

Explanation

Gap junctions are needed for cell communication and help synchronize heart beats

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15. Microvilli are thin finger like projections found in intestines and other cells. They are made from

Explanation

Microvilli are made from microfilaments (actin)

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16.

Explanation

TEM (Transmission Electron Microscopy) is used to view sections. One could not see this using a light microscope.

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17. Which type of organism would have problems in isotonic media?

Explanation

Animal cells do well in hypotonic media since there is no loss of water. However plants will wilt because there is not sufficient turgor pressure on the cell wall.

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18. Which of the following involves receptor mediated endocytosis?

Explanation

Receptor mediated endocytosis involves the uptake of specific compounds into cells using membrane vesicles..

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19. 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

Explanation

Proteins destined for like the mitochondria, the nucleus, or the membrane have amino acid signal sequences that help get them to right part of the cell.

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20. 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

Explanation

This data does not distinguish between possibilities 1 and 2; both are possible. The carbohydrates could be needed to get the protein to the ER, but we can not prove that from the data (statement 3 is possible, but not proven from the data).

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Which type a structure only uses covalent bonds?
Cilia are made of
A control in the above experiment would be
Tertiary structure uses the following types of bonds?
Which type of structure involves only hydrogen bonds?
The enzyme invertase is usually found outside the cells of yeast. the...
A genetic defect in a protein that helps actin fibers form results in...
Which type of structure involves interactions between subunits?
Lipids get made in
Click on the URL...
  Red blood cells are usually disc shaped. You hypothesize that...
An organism has an arrhythmic heart. This might be due to a defect in
Microvilli are thin finger like projections found in intestines and...
Which type of organism would have problems in isotonic media?
Which of the following involves receptor mediated endocytosis?
Histone are proteins that are usually found in the nucleus.  A...
Glucose transporters are found in the outer membranes of yeast...
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