Question

cells

1. a eukaryotic cell

a. has mitochondria.
b. has cytoskeleton.
c. has linear chromosomes.
d. can make more proteins then prokaryotic cell.
e. all of the above

1. a eukaryotic cell:

a. is usually smaller than a prokaryotic cell.
b. has its dna concentrated in one area of the cell without a nuclear membrane.
c. typically has a cell wall, in addition to a plasma membrane.
d. is exemplified by bacteria.
e. has a variety of membranous organelles.

1. dna is associated with proteins, forming a complex called______ and visible in light microscope during cell division

a. chromosomes.
b. nucleoli.
c. nucleus.
d. genes.
e. chromatin.

1. if a toxin, such as a bacterial toxin, destroys ribosomes, what cellular activity will be affected first?

a. protein synthesis
b. dna synthesis
c. movement
d. energy storage
e. active transport
figure 4 - 2 use the figure to answer the corresponding question(s).

1. refer to figure 4 - 2. the cellular structure indicated by the arrow is responsible for:

a. lipid and fatty acid metabolism.
b. protein synthesis.
c. digestion of unused organelles.
d. replication.
e. cellular respiration.

Explanation:

• Question 26: Eukaryotic cells have mitochondria, a cytoskeleton, linear chromosomes, and can produce more proteins than prokaryotic cells due to their complex structure and machinery.
• Question 27: Eukaryotic cells have a variety of membrane - bound organelles. They are generally larger than prokaryotic cells, have their DNA in a nucleus with a nuclear membrane, and are not typically exemplified by bacteria which are prokaryotes. Not all eukaryotic cells have a cell wall.
• Question 28: During cell division, DNA associated with proteins forms a complex called chromosomes which are visible under a light microscope. Nucleoli are in the nucleus and not the DNA - protein complex, the nucleus is the organelle containing DNA, genes are segments of DNA, and chromatin is the less condensed form of the DNA - protein complex.
• Question 29: Ribosomes are the sites of protein synthesis. If they are destroyed, protein synthesis will be affected first as they translate mRNA into proteins.
• Question 30: Without seeing the figure, but based on organelle functions, the endoplasmic reticulum is responsible for lipid and fatty - acid metabolism. Protein synthesis is mainly by ribosomes, digestion of unused organelles is by lysosomes, replication is mainly related to the nucleus and associated enzymes, and cellular respiration is mainly by mitochondria.

Answer:

1. e. all of the above
2. e. has a variety of membranous organelles.
3. a. chromosomes.
4. a. protein synthesis
5. a. lipid and fatty acid metabolism.