Transcription and translation occur simultaneously in prokaryotes. Why can't this process take place in
eukaryotes? What disadvantage results from such linking in prokaryotes? What will be an ideal response?
Concepts to Consider: The main barrier to linking transcription and translation in eukaryotes is, of
course, the nucleus. In addition, newly synthesized eukaryotic DNA is not ready to undergo translation
due to the need for posttranscriptional processing. In prokaryotes, the linking of transcription and
translation results in the loss of one level of possible control of gene expression.
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Answer questions 114–118 in reference to the five eye structures
listed below. a. cornea b. lens c. retina d. ommatidium e. vitreous body D 114. This structure is found in the compound eyes of insects but not in the eyes of vertebrates. M 115. This structure forms the transparent front of the eye. E 116. This structure primarily acts to focus light waves. M 117. This structure contains rods and cones in vertebrates. M 118. This structure acts to maintain the shape of the eye and to transmit light to other structures.
A virus is a noncellular infectious particle containing nucleic acid. Which type of nucleic acid listed below can be found within viruses?
A) ssRNA B) dsRNA C) ssDNA D) dsDNA E) all of the above
As a result of testing an experimental drip on a vertebrate cell, you notice that the cell cortex becomes more fluid, and
although the cell remains strong, it loses its ability to move. Based on this evidence, you correctly conclude that the drug most directly affected:a. myosin. b. ?-tubulin. c. ?-tubulin. d. actin filaments. e. intermediate filaments.
Which of the following is a function of membranes?
a) selectively permeable barrier b) helping cells respond to external stimuli c) compartmentalization d) all of the choices are correct