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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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padilas [110]

Answer:

E) Br Br

Explanation:

Covalent bond -

Covalent bond is the bond which is formed with the sharing of the electrons between the two atoms which are taking part in the bond. It is generally formed between the atoms with similar electronegativity values.

It is the bond which is generally occurs within non metals as they share electrons to complete their octet.

The difference in the electronegativity values of the atoms involving in a covalent bond must not exceed the value of 1.7 .

A covalent bond to be non polar in nature , then the atoms need to have almost similar electronegativity , so that they won't split into partial negative and partial positive charge .

Hence , from the given options of the question ,

E) Br Br , both the atoms are same , hence same electronegativity , therefore are non - polar in nature .

8 0
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Answer:

B

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