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Ipatiy [6.2K]
3 years ago
8

A molecule is applied to a cell and the intracellular Ca2+ concentration is found to transiently rise. You are curious to unders

tand the mechanism of this molecule so you remove all of the Ca2+ from outside the cell but find that the same effect is observed. You conclude that the molecule is probably having this effect because it sets into motion a chain of events that includes…
A.activation of adenylyl cyclase.
B.increasing the intracellular concentration of cAMP.
C.activation of phospholipase C.
D.blocking the Na+/K+ pump.
E.activation of a phosphodiesterase.
Biology
1 answer:
tia_tia [17]3 years ago
5 0

Answer:

The correct answer is option C.

Explanation:

Phospholipase C comes in the category of membrane-associated enzymes, which plays an essential role in the cell physiology of eukaryotes, mainly in the process of signal transduction. One of the general features of the phospholipase C pathway is that it enhances the concentration of calcium within the cell's cytoplasm.  

With the stimulation of phospholipase C within a cell, calcium generally gets discharged from the intracellular compartments, which eventually results in the upsurge of calcium levels within the cell's cytoplasm.  

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A scientist studying the effects of radiation on DNA performs an experiment in which she exposes a sequence of nitrogen bases fo
Oksana_A [137]

Answer:

D. A nitrogen base has been added to the DNA molecule.  

Explanation:

You can see that the sequence for the nitrogen bases are in the exact same order after the exposure, this rules out A.  You can count how many bases there are, 7 before and 8 after so it cannot be B. Lastly, given that they are in the same order as were before and that a base has been added, you can see that no bases were replaced (so not C) and that D is your answer.  

6 0
3 years ago
What are the two major parts of photosynthesis and why is this process important to the ocean?
kirza4 [7]
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6 0
2 years ago
All known organisms use genetic information to produce protein molecules via the same genetic code. This finding strongly suppor
jeyben [28]

Question:All known organisms use genetic information to produce protein molecules via the same genetic code. This finding strongly supports the hypothesis that __________.

a) the earliest macromolecules probably arose when lightning struck an oxygen-free atmosphere

b) all organisms are descended from one or a few common ancestors

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d) there's only one possible way to encode information in a macromolecule

Answer:

b) all organisms are descended from one or a few common ancestors

Explanation:

Protein synthesis occurs when the nucleotide sequence of the mRNA is read in the form of genetic codes. A specific genetic code specifies the same amino acid in all living beings. For example, the code "UUU" codes for phenylalanine in all the living beings irrespective of their species. This suggests that all the life forms have originated from one or few common ancestors and the genetic code has been preserved during the course of evolution of various species.

4 0
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UkoKoshka [18]
I think you might've forgotten something. There is no labels, pictures, or any options. Add some more stuff and I'd be able to help out.
8 0
3 years ago
In which of the following cell structures are the Drosophila chromosomes
Degger [83]

Answer:

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Explanation:

DNA is found in chromosomes and chromosomes are found in the nucleus because the nucleus is basically the DNA of a cell.

7 0
3 years ago
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