these four molecules exhibit one carbon tranfers: biotin,prydoxal phsophate, folic acid,s-adenosylmethionine. my question iswhat is one carbon transfer and how is it useful for fetus's.

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Beverley SmithLv2

28 Sep 2019

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Briefly answer the following questions about the major types of atoms found in biological molecules: carbon, hydrogen, oxygen,nitrogen,phosphorus and sulfur. Of the answer applies to more than one indicate which one. If the question ask for specific number of Aton name the number!. Which three types of atoms (elements) are found in all carbohydrates? Even though it contains carbon, CO2 ( carbon dioxide) is considered inorganic because it doesnât not contain hitch from? Which of the above is/are found only in protein? Which of the atoms is/are found in DNA? Which two of these besides (hydrogen) forms hydrogen bonds? Dehydration synthesis will involve the formation of a molecule contain tin which atom?

This quad-part question (A,B,C,D) focuses upon E. Coli where I need to understand this material for review up into the week of exams. First one who answers correctly & promptly will get a thumbs-up & comment of my appreciation!

A. Which molecule is secreted by an E. coli cell and may have useful activity beyond the outer membrane?

a. Peptidoglycan b. Nitrate c. Beta-Galactosidase

B. In E. coli metabolism, what is taken up from the environment and used as an electron source during respiration?

a. Nitrate b. Water c. Oxygen d. Organic Carbon

C. How many carbon atoms long would a fatty acid have to be to cause as many completions of the TCA cycle as occur from catabolism of one glucose molecule?

~~~~~~~~ANSWER SHOULD BE IN NUMERICAL FORMAT (e.c. 67)~~~~~

Please Note: I have already pondered the guess of 67 for this answer, but my teacher remains to tell me it's incorrect and to rethink it again**


	D. Which pathway(s) are most likely active in a growing E. coli population in the large intestine? Choose all that apply.

**I have already met with my teacher to see if my initial guess of both {}Embden-Mayerhoff Pathway & {}Fermentation, but says to rethink and try again....**

{}Embden-Mayerhoff Pathway
{}Pentose Phosphate Pathway
{}Tricarboxylic Acid Pathway

{}Fermentation

{}Electron Transport Chain
.

beigesquirrel731

1. Integrated metabolism

A. A molecule of glucose that you eat can eventually be transformed into part of a fatty acid that you store. Circle the pathways/cycles below that are part of this overall flow of carbon atoms. Cross out any that are not.

Gluconeogenesis, beta-oxidation, citric acid cycle, glycolysis, urea cycle, fatty acid synthesis

B. Trace the metabolic path of this glucose molecule through the enzymes it encounters along the way to being made into fat. Write all the enzymes in the list below into the proper places in the figure below. If the enzyme is not used, write its name in a ânot used" column. If it is used, write the enzyme in the order that the carbon atoms from glucose encounter the enzymes.

Pyruvate dehydrogenase, fumarase, aldolase, lactate dehydrogenase, pyruvate kinase, acetyl CoA carboxylase, fatty acid synthase, hexokinase, carnitine acyltransferase, ATP synthase

B. What is the minimum number of glucose molecules that would be necessary to be the carbon source for synthesis of a 16-carbon fatty acid through this pathway?

C. How many net glucose can be made from one molecule of a 16-carbon fatty acid?

2. Describe each cycle/transport system (compounds, compartments, tissues) and explain its purpose:

A. citrate transport system

B. Cori cycle

C. glucose/alanine cycle

Explain the logic of these pathway regulations:

A. Phosphofructokinase, not hexokinase, is the main regulation site of glycolysis.

B. SuccinylCoA inhibits the entry of acetyl CoA into the citric acid cycle.

C. NADH inhibits pyruvate dehydrogenase.

D. Citrate inhibits the citric acid cycle and activates acetyl-CoA carboxylase.

E. Insulin leads to activation of glycogen synthase.