The ribosomes of the rough endoplasmic reticulum (rough ER) are targeted to the cytoplasmic side of the membrane via
a. a signal sequence within the 28S ribosomal RNA.
b. a sequence within the protein being synthesized.
c. the S6 ribosomal protein.
d. the cap sequence at the 5?end of the mRNA being translated.
Ans: b. a sequence within the protein being synthesized.
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A tracheid is:
A. a gametophyte cell B. a small branch of an insect trachea C. a seed-bearing stem D. a specialized vascular cell E. a reproductive chamber
Hemophilia is a recessive X-linked genetic disease. A father who has hemophilia will give the defective allele to ___________
a) all of his daughters and none of his sons. b) none of his daughters and all of his sons. c) 1/2 of his daughters and none of his sons. d) all of his daughters and 1/2 of his sons.
Dimorphic fungi are capable of growing as yeasts or molds, depending on environmental conditions.
A) True B) False
Which pieces of evidence would be considered the best for establishing biological relatedness?
A) birth certificates B) pictures from family reunions C) testimony from relatives D) a very close match in the DNA profile