MCB 150 POST LEC 3

25 July 2022
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21 test answers

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question
Choose the letter that indicates the organelle that contains most of a cell's DNA.
answer
C, The nucleus contains most of a cell's DNA.
question
Which of these organelles carries out cellular respiration?
answer
mitochondrion
question
Which of these is the double membrane that encloses the nucleus?
answer
E, This is the nuclear envelope.
question
The _____ is composed of DNA and protein.
answer
chromatin
question
Ribosomal subunits are manufactured by the _____.
answer
nucleolus
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_____ are the sites of protein synthesis.
answer
Ribosomes
question
Which of these organelles manufactures proteins bound for secretion out of the cell?
answer
rough endoplasmic reticulum
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The _____ is a selective barrier, regulating the passage of material into and out of the cell.
answer
plasma membrane
question
Where is calcium stored?
answer
smooth endoplasmic reticulum
question
Which of these structures stores, modifies, and packages products?
answer
A, The Golgi apparatus modifies, stores, and packages products of the ER.
question
Which of these are hollow rods that shape and support the cell?
answer
microtubules
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is/are identical in structure to centrioles.
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Basal bodies
question
Which of these organelles produces H2O2 as a by-product?
answer
peroxisome
question
Which of these provides the cell with structural support?
answer
D, Microfilaments are a component of the cytoskeleton.
question
Which feature is shared by all monosaccharides?
answer
In their linear forms, they all contain a carbonyl and several hydroxyl functional groups.
question
How do the Ī± and Ī² forms of glucose differ?
answer
Their ring structures differ in the location of a hydroxyl group.
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What is the difference between an aldose sugar and a ketose sugar?
answer
the position of the carbonyl group
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What are three ways monosaccharides differ from one another?
answer
the number of carbon atoms they contain the location of their carbonyl group the orientations of their hydroxyl groups
question
Drag the labels on the left onto the diagram of the animal cell to correctly identify the function performed by each cellular structure.
answer
A. Synthesize Lipids B. Assemble Ribosomes C. Defines Cell Shape D. Produces Secretory Proteins E. Modifies and Sorts Proteins F. Digests Proteins G. Generates ATP
question
Drag each cell structure to the appropriate bin.
answer
prokaryotic only: nucleoid eukaryotic only: lysosome, mitochondria, nucleolus Both: ribosomes, plasma membrane, flagella
question
Drag the terms on the left to the appropriate blanks in the sentences on the right. Terms can be used once, more than once, or not at all.
answer
1. In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are microtubules 2. Many cell organelles, most notably the nucleus, are anchored by intermediate filaments which are assembled from a diverse class of proteins 3. Centrosomes are sites where protein dimers assemble into microtubules 4. The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of microfilaments 5. The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the intermediate filaments 6. During muscle contractions, myosin motor proteins move across tracks of microfilaments