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Sloan [31]
3 years ago
13

What is a polar molecule?

Biology
2 answers:
denis23 [38]3 years ago
8 0

Answer:

This your answer below the image!!!

Explanation:

cluponka [151]3 years ago
3 0

Answer:

<h3>In chemistry, polarity is a separation of electric charge leading to a molecule or its chemical groups having an electric dipole moment, with a negatively charged end and a positively charged end. Polar molecules must contain polar bonds due to a difference in electronegativity between the bonded atoms.</h3>
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A coin is flipped three times resulting in three heads. What is the probability that a fourth flip will be heads? 75% 25% 100% 5
Vinvika [58]
I think it would be 50% because it could land on heads just as much as it lands on tails. its a even chance it could land on whichever it chooses to. 
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3 years ago
Which of the following is a biological catalyst?
amid [387]

I think the answer is enzyme

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2 years ago
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Plants maintain homeostasis by ____. 1) opening and closing stomata. 2) converting excess sugar molecules to a lesser number of
Nuetrik [128]
D)all of the above 

<span>Homeostasis is the property of a system, either open or closed, that regulates its internal environment and tends to maintain a stable, constant condition within an organism. (Eg controlling amount of sugar in the bloodstream, keeping waste levels at acceptable levels.) </span>

<span>Opening and closing stomata controls the gas levels within the plant. </span>
<span>Converting excess sugar molecules to a lesser number of starch molecules regulates sugar levels. </span>
<span>Excreting waste through the cell membrane prevents waste build-up.</span>
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3 years ago
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This is the unequal distribution of ions across a cell membrane.
Nady [450]

Answer:

Concentration gradient

Explanation:

Concentration gradient of the ions across the membrane generates the membrane resting potential.

Concentration gradient means that there is unequal distribution of the ions on different sides of membrane. For example, the concentration of K ions is much higher within the cell then out of the cell. Opposite is with the Na ions. When ions move from the area of their higher concentration to the are with the lower concentration, we say they move down the gradient or diffuse (no energy required). On the other hand, movement of ions against their gradient means that this process requires energy and involves protein pumps.

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3 years ago
Many receptor tyrosine kinase pathways have mapk as a downstream signaling component. mapk can phosphorylate target proteins. wh
Lapatulllka [165]

A protein kinase that is specific to the amino acids serine and threonine is known as a mitogen-activated protein kinase (MAPK or MAP kinase; also known as a serine/threonine-specific protein kinase).

<h3>Mitogen-activated protein kinase :</h3>

A small number of cell surface receptors can ultimately generate a large intracellular response due to activation of kinase cascades.

In order to trigger an appropriate physiological response, such as cellular proliferation, differentiation, development, inflammatory reactions, and death in mammalian cells, MAPK pathways relay, amplify, and integrate information from a variety of stimuli.

Tyrosine phosphorylation, specifically numerous tyrosines on each RTK in the dimer, is how cross-linking triggers the tyrosine kinase activity in these RTKs. The term "cross-phosphorylation" refers to this action.

The activation of a MAPKKKK or MAPKKK by stimulation of plasma membrane receptors is the initial stage of signal transduction. The MAPKKK then phosphorylates two serine or threonine residues in the S/T-X5-S/T (X is any amino acid) motif of its activation loop, activating a downstream MAPKK.

Learn more about MAPK here:

brainly.com/question/23449262

SPJ4

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2 years ago
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