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notka56 [123]
3 years ago
13

What acts as a on and off switch for translation

Biology
1 answer:
bulgar [2K]3 years ago
5 0
An operator is a segment of DNA that acts as an on/off switch for a translation


different ways to call operator are
operon
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Differences between plant and animal cells​
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A plant cell has a cell wall and an animal cell doesn’t. The cell wall keeps it from moving and protects the plant.
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forsale [732]

Answer:

13 - D

14 - D

15 - C

Explanation:

for 13

A molecule is two or more atoms chemically combined

An example would be carbon dioxide which contains the two atoms, carbon and oxygen

Reasons its not the other answers:

Electrons, Protons and Neutrons are all parts of an atom therefore they cannot be classified as molecules.

For 14

Remember an atom is the most basic unit out of the units we are talking about

The answer would be D

Reasons its not the other answers

Water is considered to be a molecules as it contains two or more atoms (hydrogen and oxygen)

Air is considered to be a mixture as it contains oxygen and nitrogen which can be separated

Salt is considered to be a compound because salt is made up of two atoms (chloride and sodium) in which they are held up by an ionic bond

For 15

The answer would be C (III only)

Carbon hydrogen and oxygen all happen to by atoms

Reasons its not other answer choices:

Like stated previously water is considered to be a molecule therefore we can eliminate the other answer choices

Other notes:

Compounds and molecules both are combinations of two or more atoms however they are not to be mixed together

the main difference between compounds and molecules is how they are held together

Compounds are held together by ionic bonds while molecules are help up by covalent bonds

compounds and molecules  are made up of atoms that cannot be separated

Mixtures - A mix of two or more substances that can be separated

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There is no pigment in the brain, so it is in it's natural colour, grey.
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Answer:

I would say that A is the correct answer. Foods release amino acids. Hope this helps. :D

3 0
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