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amid [387]
3 years ago
7

True or false: the density of an object can be calculated by dividing its length by its width.

Chemistry
2 answers:
sergiy2304 [10]3 years ago
7 0
False.........................
solong [7]3 years ago
3 0
This is true!!!!!!!!!!!!!!!!!!!!!!!!
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What is restriction enzymes and what is it’s purpose?
Eddi Din [679]

Answer:  <u>Endonuclease enzymes used in molecular biology that cut DNA at specified points.</u>

Explanation:

Enzymes are specific protein types which bind to a substrate within a reaction, to increase the rate of reaction within the solution- they speed up the rate of reaction.

Restriction enzymes are bacteria-derived enzymes; these make cuts on deoxyribonucleic acid molecules or DNA. These are also called  restriction endonucleases. They are utilized in molecular biology for DNA cloning and sequencing and cut DNA into smaller pieces called fragments.

Restriction enzymes make directed cuts on DNA molecules. They precisely target sites on DNA to produce mostly identical or homogenous, discrete fragments of equal sizes, producing blunt or sticky ends. In order to do this, they recognize sequences of nucleotides that correspond with a complementary sequence on the endonuclease called restriction sites.

There are several kinds that may require cofactors (chemical or metallic compounds that aid in enzyme activity)  :

  • Type I: cleave far away from the recognition site; require ATP and  SAMe S-Adenosyl-L-Methionine

  • Type II: cleave near to the site; require Magnesium

  • Type III: cleave near to the site; require ATP which is not hydrolysed but  SAMe S-Adenosyl-L-Methionine is optional

  • Type IV: cleavage targeted to DNA that have undergone post transcriptional modification through certain types of methylation (addition of a methyl group)

7 0
3 years ago
Elements in the periodic are listed according to
sammy [17]

Answer:

the raising atomic number

Explanation:

Elements are listed on the periodic table according to their atomic number.

6 0
3 years ago
Most elements occur in nature as a single isotope.<br> TRUE<br> FALSE
cestrela7 [59]

Answer:

false

Explanation:

because elements never exist in nature as single isotopes they are always combined

8 0
3 years ago
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otez555 [7]

Answer:

<h3>option D</h3>

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<h3>Is wire A connected to the light bulb </h3>

<h3>because it is series connection</h3>
8 0
3 years ago
Match the terms to the correct 
Nadusha1986 [10]
This type of energy travels through vibrations on waves = 7. sound energy

This is the energy found in the nucleus of an atom = 9. nuclear energy

This type of energy can be transferred in three different ways = 6. thermal energy

This is the term used when energy changes from one form to another = 10. energy conversions

This has to do with the speed of an object and how much mass it has = 2. kinetic energy

This can be either kinetic or potential and has to do with the energy of position and motion of an object = 1. mechanical energy

This type of energy is stored energy = 3. potential energy

This is radiant energy from the sun = 5. light energy

This is energy that is transferred by the movement of electrons through a conductor = 4. electrical energy 

This type of energy is often found in things like batteries or food = 8. chemical energy

hope this helps
6 0
3 years ago
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