Which of the following statements is not true of proteins destined for the ER?
A) They have a signal sequence.
B) The signal sequence for the ER consists of 15-30 amino acids.
C) The proteins are modified with carbohydrates in the ER.
D) The signal sequence is subsequently removed from the mature protein.
E) The SRP binds to the protein and prevents entry into the ER until translation is completed.
E
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Which of the following contributes to the semen?
A. penis B. bulbourethral gland C. epididymides D. urethra E. vas deferens
The same basic array of bones is modified to give rise to the wing of a bat and the fin of a porpoise. Such anatomical structures are called:
A. inherited. B. homologous. C. analogous. D. uniform. E. evolutionary modifications.
The definition of phenotypic plasticity is when a single genotype may produce different phenotypes in response to environmental stimuli
a. true b. false
After the decolorizer has been added, Gram-positive organisms are stained ________ and Gram-negative organisms are stained ________.
A. purple; purple B. purple; colorless C. purple; pink D. pink; pink