That would be a sunspot, I believe.
Hope it helps!
C. an aerobic process that produces ATP from pyruvic
<span>What a fascinating question! Just out of college, on my first job,
I was called to the delivery room to assist the obstetrician in
collecting a blood sample from the not-yet born fetus? scalp. I was
nearly immobilized at the sight of the impending birth. Ever since
that night, I have gotten goosebumps when witnessing a birth. It is
certainly an amazing event, and pondering the entire journey from
conception to birth is marvelous!
Some of the material I have found is published by religious, political
and anti-abotion sites. Neither Google Answers nor I endorse any of
these sites. Such web pages were cited here for conception and
gestation information, and not because of ideology.</span>
Answer:
Any process that involves active transport most often involves the expenditure of energy in the form of ATP hydrolysis.
Explanation:
Active transport in cells is a form of transport which involves the transport of solute molecules across a membrane against a concentration gradient using energy provided from some chemical reaction occuring in the cell.
Active transport is an endergonic (energy-requiring) process and therefore, must proceed only when coupled to an exergonic (energy-releasing) process such as the breakdown of ATP, an oxidation reaction, absorption of sunlight, etc.
In many instances in cell, such as the Na/K pump, ATP hydrolysis is the the common exergonic reaction to which active transport is coupled to.
Answer:
Explanation:
The genes in DNA encode protein molecules, which are the "workhorses" of the cell, carrying out all the functions necessary for life. For example, enzymes, including those that metabolize nutrients and synthesize new cellular constituents, as well as DNA polymerases and other enzymes that make copies of DNA during cell division, are all proteins.
In the simplest sense, expressing a gene means manufacturing its corresponding protein, and this multilayered process has two major steps. In the first step, the information in DNA is transferred to a messenger RNA (mRNA) molecule by way of a process called transcription. During transcription, the DNA of a gene serves as a template for complementary base-pairing, and an enzyme called RNA polymerase II catalyzes the formation of a pre-mRNA molecule, which is then processed to form mature mRNA (Figure 1). The resulting mRNA is a single-stranded copy of the gene, which next must be translated into a protein molecule.
