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3 years ago

One pyruvate molecule will generate _______ molecules of CO2 after completing the citric acid cycle

Biology

2 answers:

Rzqust [24]3 years ago

8 0

Answer:

c) 3

Explanation:

Cellular respiration includes following 3 processes:

1) Glycolysis

2) Citric acid cycle or TCA or Kreb's cycle

3) Electron Transport Chain (ETC)

In glycolysis, a 3 carbon compound known as pyruvate is produced from glucose. Each glucose molecule produces 2 pyruvate molecules. Each pyruvate molecule then enters a complex known as Pyruvate dehydrogenase complex wherein the pyruvate molecule further undergoes oxidative decarboxylation to produce a 2 carbon compound known as Acetyl-CoA.

The Acetyl-CoA then enters citric acid cycle or TCA or Kreb's cycle wherein this Acetyl-CoA and oxaloacetate are oxidized to produce CO₂ molecules in eight steps. Each glucose molecule is capable of producing six CO₂ after the completion of citric acid cycle. Since one glucose molecule produces 2 pyruvate molecules then it means a pyruvate molecule will be able to produce three CO₂.

Pavel [41]3 years ago

6 0

Answer:

Option B, 1

Explanation:

Two pyruvate molecules enters into the citric acid cycle and during the stage of pyruvate oxidation , one carboxyl molecules detaches from each pyurvate group thereby forming carbon dioxide and leaving behind a molecule consisting of two carbon for further processes. Hence, in one complete CAC two carbon dioxide molecules are released from two pyruvate molecule. This means that One pyruvate molecule will generate one molecules of CO2 after completing the citric acid cycle

Hence, option B is correct

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Scientists studying transcription in yeast (Saccharomyces cerevisiae) created an experimental strain that produced a modified RN

SpyIntel [72]

Answer:

elongation rate of strain of S.cerevisiae during transcription.

wild-type and experimental strain not treated with soultion of amanitin will be the control group. The elongation rate of mRNA of this group must be observed.

Explanation:

Dependent variable is one whose value depends on another value. Here effect of presence of mRNA polymerase enzyme and inhibtor on elnogatino rate of mRNA is being observed. So elongation rate is the dependent variable

Control group is one where independent variable whose effect is being observed can't influence the results. In experiment 2, the effect of inhibitor is being observed. So the control group must not have that inhibitor. Other conditions must remain same for experimentan and control group.

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3 years ago

The hormone oxytocin aids the birth process by stimulating:__________

zavuch27 [327]

Answer:

The hormone oxytocin aids the birth process by stimulating: uterine wall contractions.

Explanation:

Oxytocin is a hormone that is released naturally in the body of women and that intervenes in certain physiological processes, activating behaviors at a mechanical level in specific organs such as the uterus and the breasts. In the case of the uterus, oxytocin stimulates and maintains the contraction of the smooth muscle of the uterus during labor and delivery, that is, it is responsible for the existence of contractions, which occur during intercourse, due to the distension of the uterus that occurs produced during labor.

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3 years ago

Describe pulmonary circulation pathway using the following terms: deoxygenated blood, left atrium, lungs, oxygenated blood, pulm

ehidna [41]

Definition:
"The type of circulation pathway in which venous blood is passed
from the right atrium of the heart through the right ventricle and
 pulmonary arteries to the lungs where it is oxygenated and its return via the pulmonary veins to enter the left auricle and participate in the systemic circulation".

Explanation:
There are two circulatory path in cardiovascular system namely pulmonary circulation and systemic circulation. Pulmonary circulation path allows for blood circulation through lungs for oxygenation while systemic circulation allows for transport of oxygenated blood to all parts of the body.

Pulmonary Circulation Pathway:
Pulmonary circulation pathway consist of:

1. Superior and inferior vena cava:
De-oxygenated blood from lower parts of the body enter to right atrium through inferior vena cava. Similary, deoxygenated blood from upper parts of the body enter to right atrium through superior vena cava.

2. Right atrium and right ventricle:
From right atrium the blood passes to right ventricle through tricuspid valve.

 3. Pulmonary artery:
Afterwards, the blood enters the pulmonary artery via the pulmonary valve. The pulmonary artery divides into two arteries with one artery entering the right lung and the other artery entering the left lung. When the blood reaches the lungs through the left and right pulmonary arteries, it moves over alveoli via the capillary beds. 

4. Left atrium and left ventricle:
After the blood gets oxygenated, it moves back to the heart and this time moves into the left atrium, completing the pulmonary circulation path.

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3 years ago

Which of the following is not part of most mollusks? a. foot b. mantle c. shell d. flagella

levacccp [35]

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4 years ago

Read 2 more answers

o texto menciona pelo menos dua caracteristicas do bagrinho que o caracterizam como ser vivo. que caracteristicas mencionadas no

Flauer [41]

translation: in most texts, how do we recognize that a living thing has life?

According to the cell theory which states that:

1.All living things are made up of one or more cells.

2.All living cells come from pre-existing cells, by division.

3.The cell is the fundamental, structural unit of all living organism.

The organismal theory on the other hand argues that during plant growth/evolution, the original cell expanded into the whole organism. This opposes the 2nd tenet of the cell theory that all living cells come from pre-existing cells by division.

7 0

3 years ago