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Exam 4: Cell Structure and Function

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Question 21

Multiple Choice

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Which is NOT true about the cell theory?

A) Its various parts were described by Schleiden, Schwann, and Virchow.
B) It states that all organisms are composed of cells.
C) It states that all cells come from preexisting cells.
D) It states that bacteria and other small organisms can arise spontaneously.
E) It is accepted today by biologists as applying to virtually all forms of life.

F) None of the above
G) A) and E)

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Question 22

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Mitochondria have an inner membrane system called thylakoid membranes.

A) True
B) False

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Question 23

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Of the following, which is NOT associated with the mitochondria?

During cellular movement which of the following filaments will be the ones that are responsible for attaching and pulling the other filaments along?

After proteins are formed by the ribosomes located on the endoplasmic reticulum, what is the next organelle to which they could be transported?

What cellular organelle is responsible for receiving the mRNA and turning it into a protein?

Which of the following features is unique to bacterial cells?

Most bacteria live in a solution that is hypotonic relative to the cytoplasm of the bacteria. The cell wall of a bacterium is a peptidoglycan polymer that is tightly cross-linked. This would therefore function to

Which of the following gives rise to both lysosomes and vesicles?

A multicellular organism like a rabbit will be

An amino sugar called N-acetylmuramic acid is an important building block of the cell wall of some bacteria. Penicillin prevents this amino sugar from being incorporated into the bacterial cell wall. Therefore,

DNA is housed within the nucleus, but the mRNA code needs to leave in order to be translated into a protein. How does the mRNA code leave the nucleus if the nucleus is surrounded by the nuclear envelope?

Which cellular organelle is the most prominent?

If you were to design a structure that would have the greatest potential to interact with the environment through surface area contact, would you design a structure similar to Figure A, B or C? Explain your answer. A. One may calculate surface area (height x width x number of sides x number of cubes) of the three Figures to compare the surface areas. C. The structure made of several smaller cubes has more surface area than a structure like Fig.

All cells have these two characteristics:

Mitochondria and chloroplasts are able to reproduce independently from the division of the cell.

Use Figures A, B and C to answer Questions 40 - 44. Figure A is an 8-cm. cube. Figure B is eight, 4-cm cubes. Figure C is sixty-four, 2-cm cubes. Topic: Cell Theory -What figure has the greatest surface area (height x width x number of sides x number of cubes) ?

The springtail is a very common small insect that lives in rotten logs, rich soil, and other humid places. Its cuticle is water repelling (hydrophobic) except for a strange organ, the collophore, on its ventral side. Because it lacks the excretory organs of other insects, the springtail has this organ in contact with the water (it is responsible for ion balance and secretion of wastes) . If we examined the cell structure of this collophore, we would expect to find a high number of

What organelle would be found in increased quantities in the liver cells of a person who abuses alcohol and / or other drugs on a regular basis?

According to the endosymbiosis theory _______ were engulfed by larger eukaryotic cells.