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notka56 [123]
4 years ago
14

Which of these elements is rarely found in organic molecules?

Biology
2 answers:
OverLord2011 [107]4 years ago
5 0
I'd say Barium. It's an alkaline earth metal, so it wouldn't normally be found in organic molecules.

Svetlanka [38]4 years ago
4 0

Answer:

Barium.

Explanation:

The important element present in the living organism is carbon, hydrogen, nitrogen and oxygen. These elements are important for the formation of biomolecules of the living organism.

Barium is rarely found in organic molecules as barium is the alkaline earth metal. The barium is generally found in plants and rarely present in the living organism. Barium does not play such an important role as played by the other organic molecule. Hence, barium is rarely found in the living organism.

Thus, the correct answer is option (3).

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7 0
3 years ago
At the isoelectric ph of an amino acid which has two pka values the net charge is ________.
Ierofanga [76]

The isoelectric pH has been defined as the electrically neutral molecule. "At the isoelectric pH of an amino acid that has two pKa values the net charge is <u>0</u>." Thus, option C is correct.

<h3>What is isoelectric pH?</h3>

The isoelectric pH has been defined as the potential of the hydrogen at which the molecule does not carry a net charge and is said to be electrically neutral. The amino acids at isoelectric pH do not carry a charge.

If there are two pKa values of the amino acid then the amino acid has zero charges as the amino acids are always neutral at the isoelectric point.

Therefore, in option C. the net charge is <u>zero</u>.

Learn more about isoelectric pH, here:

brainly.com/question/12996700

#SPJ1

Your question is incomplete, but most probably your full question was, At the isoelectric pH of an amino acid that has two pKa values the net charge is _______.

A) 0.5

B) 1

C) 0

D) -1

6 0
2 years ago
Fill in the word that completes each sentence.
DENIUS [597]

Answer:

Glucose, resperation

Explanation:

6 0
3 years ago
What is the tough and flexible layer that surrounds plant cells as well as some algal and bacterial cells?
Monica [59]
It is probably the cell wall
7 0
4 years ago
Read 2 more answers
Which statement is TRUE of an archaeological survey?
Maslowich

Answer:

The correct option is A.

A. Small test pits can be conducted in an undisturbed part of the surveyed area to find buried artifacts that may not be readily seen on the surface.

Explanation:

This is because archeological survey refers to the study , exploration and digging of sites to obtain archeological remains. The basic sim of this is to get remains that are not visible to man underneath.

usually , the sites are dug out by a shovel so as to determine whether the soil contains any archeological emains that cannot be seen on the surface. This involves the action of excavating the out something or remains especially an archaeological site.

5 0
3 years ago
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