Which of the following accurately describes the path travelled by a new protein as it is synthesized and released from the cell?
A. plasma membrane ER transport vesicle
Golgi cytosol external environment
B. cytosol ER Golgi transport vesicle
plasma membrane external environment
C. nuclear envelope ER transport vesicle
Golgi plasma membrane external
environment
Answer Key: B
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A ________ genome exists as several separate, nonidentical molecules that may be packaged together or separately.
A. diploid B. fractionated C. polyploid D. segmented
The fundamental difference between an organism's genotype and its phenotype is that
A. the phenotype refers to all of the genetic material in the organism, whereas the genotype represents only the genetic material that is expressed into proteins. B. the genotype refers to eukaryotic genes that contain both introns and exons, whereas phenotype refers to bacterial DNA that has only exons. C. the genotype refers to all of the genetic material in the organism, whereas the phenotype represents only the genetic material that is expressed into proteins. D. the genotype refers to the organism's genes and the phenotype refers to the non-coding segments of DNA.
Secretory IgA antibodies are unique because they
A) have unique light chains. B) are Y-shaped molecules. C) are present in the plasma. D) are connected with J chains and short polypeptides to form dimers. E) are present in lymph nodes.
A baker forgets to put yeast in his bread dough. Which of the following do you expect to happen to the bread as a result?
A) It will take longer to bake. B) Bacterial contaminants will now be able to grow. C) The bread will not rise. D) The bread will look normal but will be tough. E) The bread will have a sour taste.