Which of the following are true statements about gibberellins? Check all that apply.
_____ They can restore normal growth and development in certain dwarf mutants.
_____ They inhibit amylase and other hydrolytic enzymes.
_____ They are produced in the apical regions of shoots and roots.
_____ They promote internode elongation.
_____ They hasten seed germination.
__X__ They can restore normal growth and development in certain dwarf mutants.
_____ They inhibit amylase and other hydrolytic enzymes.
__X__ They are produced in the apical regions of shoots and roots.
__X__ They promote internode elongation.
__X__ They hasten seed germination.
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What is the purpose of regulatory proteins?
a. To store nutrients b. To defend against foreign invaders c. To catalyze a specific chemical reaction d. To control the expression of specific genes e. To strengthen and protect cells and tissues
Of the following steps associated with translation, which does not involve hydrolysis of GTP?
A) aminoacylation of tRNA B) formation of the initiation complex C) binding of the aminoacyl tRNA to the codon at the A site D) translocation of the ribosome E) release of polypeptide
The RNA world hypothesis proposes that the world may have been filled with RNA-based life before it was filled with DNA-based life. This hypothesis is based on which of the following observations?
a) RNA enzymes can link together nucleotides. b) RNA is abundant in living organisms. c) RNA has the ability to catalyze chemical reactions like proteins. d) RNA can store information like DNA. e) All of these observations support the RNA world hypothesis.
)
A. Synercid and linezolid are two of the newer antibiotics that inhibit protein synthesis. B. Synercid and linezolid are used to treat some of the very resistant gram-positive bacteria. C. Synercid and linezolid are relatively toxic to the kidneys. D. Synercid inhibits initiation of protein synthesis while linezolid inhibits the action of the 50S ribosome and translation. E. Synercid and linezolid are effective antitubercular antibiotics.