What form of RNA carries instructions from the nucleus to the ribosome?
a. tRNA
b. mRNA
c. sRNA
d. rRNA
e. bRNA
B
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What would happen to the seasons if the Earth were tilted 35 degrees off its orbital plane instead of the usual 23.5 degrees?
A) The seasons would disappear. B) Winters and summers would be more severe. C) Winters and summers would be less severe. D) The seasons would be shorter.
Which of the following correctly describes the path of excretory fluids through a mammalian nephron?
A. glomerulus, Bowman's capsule, Bowman's space, proximal convoluted tubule, loop of Henle, distal convoluted tubule, collecting duct B. glomerulus, Bowman's space, Bowman's capsule, proximal convoluted tubule, distal convoluted tubule, loop of Henle, collecting duct C. Bowman's capsule, glomerulus, Bowman's space, proximal convoluted tubule, loop of Henle, distal convoluted tubule, collecting duct D. Bowman's capsule, Bowman's space, glomerulus, proximal convoluted tubule, distal convoluted tubule, loop of Henle, collecting duct E. collecting duct, proximal convoluted tubule, loop of Henle, distal convoluted tubule, Bowman's capsule, Bowman's space, glomerulus
In bacteria, a unique RNA that binds the A site of the ribosome and directs the addition of approximately 12 amino acids to the nascent peptide when no stop codon is present is called the ________.
Fill in the blank(s) with the appropriate word(s).
Expression of a microRNA complementary in sequence to a gene _____ that gene
a. blocks transcription of b. replicates c. speeds transcription of d. inhibits translation of e. methylates the bases in