Name four mechanisms that may be involved in controlling reinitiation in bacteria
What will be an ideal response?
Ans: Physical sequestration of the origin, delay in remethylation, inhibition of DnaA binding, and repression of dnaA transcription may control reinitiation.
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Which of the following is not true of the process of nonsense-mediated mRNA decay?
A. Its function is to destroy mRNA molecules with premature stop codons. B. The participation of the ribosome is not required. C. It requires the marking of the mRNA before the mRNA is exported to the cytoplasm. D. It involves the removal of the 5' cap of the mRNA.
Photorespiration
A. uses a 3-carbon sugar precursor to produce oxygen. B. tends to occur under dry and hot conditions. C. uses the enzyme PEP carboxylase rather than rubisco to produce 3-phosphoglycerate. D. occurs in C4 plants. E. requires CO2.
Shallow water benthic algae distribution is dependent upon ________ when close to shore
a. sunlight and turbidity b. water depth and turbidity c. sunlight and substrate d. water depth and oxygen levels
The osmoregulatory process called secretion refers to the _____
A) reabsorption of nutrients from a filtrate B) selective elimination of excess ions and toxins from body fluids C) formation of an osmotic gradient along an excretory structure D) expulsion of urine from the body