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lyudmila [28]
3 years ago
12

Why coal is not commonly used?

Biology
1 answer:
dimaraw [331]3 years ago
4 0

Answer:

One reason, it causes global warming

Explanation:

It is a major source of carbon dioxide when it burns.Furthermore, the ash coal produces makes it impossible to get things clean.

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Which statement is true of both active transport and facilitated diffusion?
enyata [817]

The correct answer is option (D) The active transport and the facilitated diffusion both involve the proteins present in the cell membrane.

Facilitated diffusion transport the large and the charged molecules through the protein transport channels present in the cell membrane. In this case, the solute move from a region of higher concentration to lower concentration and it does not require energy.

Active transports takes place when the molecules move from a region of lower concentration to higher concentration via the membrane protein channels.

Both facilitated diffusion and active transport requires the proteins present in the cell membrane.

7 0
3 years ago
What are characteristics of allosteric enzymes?
Veronika [31]

Answer:

(B) They may have binding sites for regulatory molecules that are separate from active sites.

(C) They generally have more than one subunit.

(E) They interconvert between a more active form and a less active form.

Explanation:

Allosteric enzymes are the regulatory enzymes that have a specific site for binding of modulator or effector molecule. The activity of these enzymes is altered by the noncovalent binding of modulators at the allosteric site. The binding of the modulator brings about a conformational change in the allosteric enzymes.

The relatively inactive conformation of these enzymes is called T state while the active conformation is the R state. Most of the allosteric enzymes have multiple subunits and deviate from Michaelis–Menten kinetics and exhibit a sigmoid saturation curve of V0 vs. [S].

5 0
3 years ago
Measures how much matter is present in a substance
sdas [7]

Density. Density is the measurement of how much matter is in a substance

7 0
3 years ago
What the answer fo this
Dmitrij [34]

Answer:

b

Explanation:

because they are mammals

5 0
2 years ago
An inference is:
faust18 [17]

Answer:

I think its the third one :)

Explanation:

hope this helped :))

5 0
3 years ago
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