Area under velocity-time graph gives:

Biology

1 answer:

AlexFokin [52]3 years ago

4 0

Answer:

The area under a speed-time graph represents the distance travelled.

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The information of a new species can result from what?

Mars2501 [29]

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macroevolution or microevolution

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Which of the following statements best defines the term operon? a. An operon is a region of RNA that consists of the coding regi

denis-greek [22]

The correct answer is: c. An operon is a region of DNA that codes for a series of functionally related genes under the control of the same promoter.

Operons contain cluster of genes that are transcribed together into mRNA or are not expressed at all. Formed mRNA undergos splicing to create monocistronic mRNAs so that can be translated separately. Operons are more often found in prokaryotic cells but it can appear in eukaryotic cells and in viruses.

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The tendency for individuals to minimize any positive events that they may be experiencing is part of having dysfunctional or ne

navik [9.2K]

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In the epinephrine pathway, an inhibitor of phosphodiesterase activity would have which of the following effects? A. block the a

Artemon [7]

Answer: C). prolong the effect of epinephrine by maintaining elevated cAMP levels in the cytoplasm

Explanation: In the epinephrine pathway, binding of epinephrine to its receptor triggers a conformational change in the receptor and the interaction of the receptor with its associated Gs protein. This interaction causes the replacement of GDP bound to Gs protein with GTP thus activating the Gs protein. The activation of the Gs protein causes the alpha subunit of the Gs protein to dissociate and move to adenylyl cyclase, another membrane protein in the pathway. The association of the alpha subunit of the Gs protein with adenylyl cyclase activates adenylyl cyclase which in turn catalyzes the synthesis of cyclic AMP (cAMP) a second messenger. cAMP is quickly degraded to 5'-AMP by an enzyme phosphodiesterase. Inhibition of the activity of phosphodiesterase will increase the half life and the cytoplasmic level of cAMP thus potentiating the action of epinephrine.

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