Question 111 pts The synthesis

Question 111pts

The synthesis ofethanol by yeast may be summarized as:

lactate toacetaldehyde to ethanol

Group of answer choices

True
False
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Question 121pts

In glycolysis,glucose is converted into two 3-carbon molecules.

Group of answer choices

True
False
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Question 131pts

“Substrate-levelphosphorylation” refers to the synthesis of ATP by a mechanismother than oxidative phosphorylation

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True
False
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Question 141pts

A thioester is ahigh-energy intermediate in metabolism.

Group of answer choices

True
False
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Question 151pts

In glycolysis,pyruvate kinase is used to synthesize pyruvate and ATP fromphosphoenolpyruvate.

Group of answer choices

True
False
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Question 161pts

Pyruvate is the endproduct of anaerobic glycolysis.

Group of answer choices

True
False
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Question 171pts

The conversion ofpyruvate to lactate in anaerobic glycolysis serves an importantrole in regenerating NAD+.

Group of answer choices

True
False
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Question 181pts

Pasteur effectdemonstrates the inhibition of glycolysis by oxygen.

Group of answer choices

True
False
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Question 191pts

Major fuel moleculescan be metabolized by the TCA cycle.

Group of answer choices

True
False
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Question 201pts

Biomolecules with athioester linkage have higher free energy than an esterlinkage.

Group of answer choices

True
False
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Question 211pts

Anapleurotic pathwayassociated with the TCA cycle is important for maintaining itsworking capacity.

Group of answer choices

True
False

Answer:

Question number 11) False

Explanation:

During ethanol fermentation pathway, glucose is converted intopyruvate. Further, the enzyme pyruvate decarboxylase catalyses theconversion of pyruvate to acetaldehyde. Then acetaldehyde isconverted into ethanol catalyzed by the enzyme alcoholdehydrogenase.

Question number 12)

Answer: True

Explanation:

Glycolysis is a metabolic pathway of an organism in whichglucose will be converted into pyruvate in a sequence of reactions.Glucose consists of six carbon atoms and pyruvate is a three carboncompounds, hence, in glycolysis, glucose is converted into two3-carbon molecules.

Question number 13)

Answer: True

Explanation:

Substrate-level phosphorylation represents a metabolic reactionin which substrates having higher energies is converted into alower energy produce as a result ATP or GTP will be generated.

Question number 14)

Answer: True

Explanation:

Thioesters represent the most common intermediate formed in manyof the biosynthetic pathways. Some of the examples of thioestersare acetyl-CoA, malonyl-CoA etc. Thioesters has high free energywhich is almost similar to the reactants.

Question number 15)

Answer: True

Explanation:

This reaction constitutes the last step in the glycolysis, wherethe enzyme pyruvate kinase transfer one phosphate group fromphosphoenolpyruvate to adenosine diphosphate (ADP). This results inthe production of adenosine triphosphate (ATP) and pyruvate.

Question number 16)

Answer: False

Explanation:

Pyruvate is the end product of the aerobic glycolysis whereas inanaerobic glycolysis the pyruvate formed will be rapidly convertedinto lactate. Hence, the endproduct of anaerobic glycolysis islactate.

Question number 17)

Answer: True

Explanation:

The supply of NADH are limited and therefore the cell willrecycle NADH. Two NADH molecules are produced as a result of singleglycolysis pathway and these NADH molecules formed should beoxidized into NAD+ for the glycolysis process to continue. Thus,the conversion of pyruvate to lactate will oxidize NADH to formNAD+.


 
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