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NikAS [45]
3 years ago
8

Which statement best describes why liquid water exists on earth?

Biology
1 answer:
klemol [59]3 years ago
8 0

Answer:

Honestly I wouls say C.

Explanation:

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Consider this animal cell which organelle is labeled A
Rom4ik [11]
The organelle which labelled A is C. golgi apparatus
6 0
3 years ago
Read 2 more answers
Which enzyme(s) involved in fatty acid synthesis utilize ATP? Select all that apply.
GREYUIT [131]

Answer:

a. Acetyl CoA carboxylase  

Explanation:

Much of the fatty acids used by the body is supplied by the diet, excessive amounts of carbohydrates and protein obtained from the diet can be converted to fatty acids and stored as triglycerides. Fatty acid synthesis occurs mainly in the liver and mammary glands, and to a lesser extent in adipose tissue and kidney, the process incorporates acetyl CoA carbons into the forming fatty acid chain using ATP and NADPH.

The acetyl portion of acetyl CoA is transported to cytosol as citrate, produced by condensation of oxaloacetate and acetyl CoA, the first reaction of the citric acid cycle, this occurs when the concentration of mitochondrial citrate is high, observed when there is a high concentration of ATP and isocitrate dehydrogenase is inhibited.  The increase of citrate and ATP favors the synthesis of fatty acids, since this pathway needs both. Acetyl CoA should be converted to malonyl CoA. Carboxylation is catalyzed by acetyl CoA carboxylase and requires ATP, this reaction is the regulated step in fatty acid synthesis: it is inactivated by products, malonyl CoA and palmitoyl CoA, and activated by citrate, another regulatory mechanism is reversible phosphorylation of enzyme, which makes it inactive due to the presence of adrenaline / glucagon

6 0
3 years ago
Which of the following is an example of a negative feedback loop? Select one: a. Uterine contractions to expel a fetus during la
PtichkaEL [24]

Answer:

d

Explanation:

<em>The correct answer would be increasing heart rate to compensate for low cardiac output.</em>

The negative feedback loop is the mechanism that is utilized in the maintenance of homeostasis. They work by opposing the processes that bring about a deviation away from setpoints, that is, the normal range of operation of physiological processes in the body.

<u>For example, when the heart rate goes below the setpoint, the negative feedback loop swings into action through the sensor, the control center, and the effector to return the heart rate to the normal operating range.</u>

Correct option: d

6 0
3 years ago
Are the 1st three correct and help.with the rest?
klasskru [66]
Hello there,
#5- Proteins
#6- is incorrect the answer is-->> ATP synthesis 
#8- Photosynthesis
#9- Cell recognition components

Hope this help,
Have a nice day!
8 0
3 years ago
About 99% of the atmosphere is composed of
hichkok12 [17]
Nitrogen and oxygen make up about 99%of the atmosphere. I'm not sure if it will help! But thats all I know.
5 0
3 years ago
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