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solong [7]
2 years ago
13

A researcher is trying to culture mouse embryonic stem cells, and is providing them with glucose (sugar) as a food source. In or

der for these cells to survive in culture, he must also add a mixture of essential amino acids to the culture medium. These essential amino acids are _____.
Chemistry
1 answer:
Semmy [17]2 years ago
8 0

Answer:

It is a fact that there are nine essential amino acids, which are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

However, he needs to add at least twelve essential amino-acids to the culture for the cells to survive. They are: arginine, cystine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, histidine, tyrosine and valine.

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Which of the following is an example of a consumer?
PIT_PIT [208]

Answer:

D. Rabbit

Explanation:

The rabbit is the consumer because he/she (im not judging) will have to consume other plants or small insects to get his/her (again not judging) energy

5 0
3 years ago
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Why are numbers placed before the elements and molecules in a<br>chemical equation?​
Neko [114]

Answer:

the are coefficients for the atom. the tell how many there are.

Explanation:

they tell you how many atoms there are of its type.

ex. 4 C²H³. there are 4 of the c² and h³ (couldn't find a way to use subscript so used the power signs to show.)

7 0
3 years ago
PLSSS HELP. And there’s also at the bottom of the picture another option if u didn’t see it
WARRIOR [948]

Answer:

B. Gradualism

Explanation:

8 0
2 years ago
1) Define water gas<br>2) The skuLL is divided into two parts name them​
Triss [41]

• a fuel gas consisting mainly of carbon monoxide and hydrogen, made by passing steam over incandescent coke

• the cranium and the mandible.

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5 0
2 years ago
A 6.87-L sample of gas has a pressure of 0.732 atm and a temperature of 95 °C. The sample is allowed to expand to a volume of 9.
Jlenok [28]

Answer: The new pressure of the gas, assuming that no gas escaped during the experiment is 0.470 atm

Explanation:

Combined gas law is the combination of Boyle's law, Charles's law and Gay-Lussac's law.

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.732 atm

P_2 = final pressure of gas = ?

V_1 = initial volume of gas = 6.87 L

V_2 = final volume of gas = 9.22 L

T_1 = initial temperature of gas = 95^oC=273+95=368K

T_2 = final temperature of gas = 44^oC=273+44=317K

Now put all the given values in the above equation, we get:

\frac{0.732\times 6.87}{368}=\frac{P_2\times 9.22}{317}

P_2=0.470atm

Thus the new pressure of the gas, assuming that no gas escaped during the experiment is 0.470 atm

7 0
3 years ago
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