Which one of the following organelles is involved in the production of proteins that are exported from the cell?
A) rough endoplasmic reticulum
B) lysosome
C) mitochondrion
D) smooth endoplasmic reticulum
E) centriole
A
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The sterile portions of a flower are the
a. petals and pistils. b. petals and sepals. c. petals and carpels. d. sepals and carpels
Humans have 23 pairs of chromosomes; how many linkage groups are present in humans?
a. twenty-three—one group for each pair of chromosomes b. forty-six—one group for each chromosome c. two—one with the male gamete, and one with the female gamete d. Because linkage groups are formed when two or more genes are inherited together, the number is nearly infinite.
Which list describes the correct sequence of events involved in cell signaling?
a. signal transduction, reception, signal transmission, response b. response, signal transduction, signal transmission, reception c. signal transmission, signal transduction, reception, response d. reception, signal transmission, response, signal transduction e. signal transmission, reception, signal transduction, response
For approximately two-thirds of human cancers, the rates of metastasis to different organs can be explained by ________ patterns
Fill in the blank with correct word.