Explain how proteins that are produced in a cell correctly end up in the cytosol, the endomembrane
system, and the mitochondria.
What will be an ideal response?
Proteins destined for the cytosol are synthesized on free ribosomes, so the proteins can simply be
released into the cytosol after termination of translation. Proteins that are targeted for the
endomembrane system are also made on free ribosomes. However, they have a short signal sequence
of amino acids toward their N-terminus that allows the proteins to be delivered to the ER. Proteins that
need to be delivered to the mitochondria are also made on free ribosomes, but contain a transit
sequence of amino acids near their N-terminus that allows them to be targeted to the mitochondria.
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A microarray:
A. is a technique that relies upon Taq polymerase. B. is typically done following gel electrophoresis. C. is a method that detects a single SNP. D. is a method that detects chromosomal mutations. E. None of the answer options is correct.
Organisms that live under similar environmental conditions and location, and interact directly or indirectly are part of the same:
a. ecosystem. b. biosystem. c. abiotic habitat. d. biotic habitat. e. population.
Which of the conditions necessary to maintain
genetic equilibrium is the least likely to occur in a natural population?
a. no mutations b. an infinitely large population c. a population isolated from other populations d. random mating e. all individuals producing the same number of offspring
Lateral line organs allow:a
invertebrates to detect gravity. b. humans to perform skillful acts with their eyes closed. c. amphibians to detect light. d. fish to detect vibrations in water. e. birds to detect sound waves