Cell proliferation in culture is normally limited by
A) cytophagy.
B) quorum sensing.
C) contact inhibition.
D) competition.
E) nutrient limitation.
C
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The primary muscle(s) involved in human breathing is/are the ____
a. external intercostals
b. internal intercostals c. diaphragm d. abdominal wall e. lung
For the following medical conditions, describe the likely cellular organelle or structure that has been
affected in such a way as to cause the condition (note: There may be more than one organelle or structure involved): A. The sperm of a man cannot swim, thus rendering him infertile. B. A child experiences kidney failure due to Fabry's disease where the cells lining the inside of the kidney tubule accumulate abnormally large amounts of glycolipids that are usually degraded by enzymes. C. A person dies within minutes after ingesting cyanide because ATP is no longer being synthesizedWhat will be an ideal response?
During the preparation of a human genomic library, plasmids containing human DNA fragments are inserted into:a
compatible human cells. b. an antibiotic-resistant strain of E. coli to protect the inserted fragments. c. antibiotic-sensitive E. coli cells that become antibiotic-resistant if transformed. d. bacteriophages. e. mRNA molecules.
What makes an organism a prokaryote?
A) Prokaryotes lack membrane bound organelles. B) They have plasma membranes to protect them from their surrounding environment. C) They contain DNA and ribosomes within the cell. D) It's cellular components are found within cytoplasm.