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Ira Lisetskai [31]
3 years ago
7

PLEASE ONLY ANSWER IF YOU KNOW THE ACTUAL ANSWER ILL GIVE BRAINLIEST <3

Biology
1 answer:
Dimas [21]3 years ago
6 0

Answer:

(C  RNA can catalyze biological reactions and most likely appeared before DNA.

Explanation:

From my knowledge, I believe...

RNA most likely appeared before DNA and is known to be an unstable molecule.

<em>kiniwih426</em>

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Help d d d d d d d dd d d d d d d
klio [65]

Answer:

A: By breaking and reforming chemical bonds in the molecules

Explanation:

There is energy stored in chemical bonds between food molecules, called ATP.  When chemical bonds are created, some energy is stored in those bonds.  When one of these bonds are broken, the energy that was stored is released, and can then be used by your body.  Your body then uses a different type of energy, called ADP, to reform the bonds, which then go on to become waste products.

I hope this helps!

<h2><u>PLEASE MARK BRAINLIEST!</u></h2>
7 0
3 years ago
Read 2 more answers
Choose the answer that best describes the liverâs role in lipid digestion. choose the answer that best describes the liverâs rol
Harlamova29_29 [7]
The liver role in lipid digestion is the PRODUCTION OF BILE, A SOAPY COMPOUND THAT EMULSIFIES LIPIDS. Bile is a digestive juice that is produced by the liver. In humans, lipids are digested and absorbed at the small intestines. Bile which contains bile acids emulsify lipids at the small intestines so that the lipids can be acted upon by the enzyme pancreatic lipase.
5 0
3 years ago
Help?! (There is two screenshots with 1 question on both)
Gelneren [198K]

with the prey there is always going to be something that is going to eat them it is called the food chain

7 0
3 years ago
Proteins are important food nutrients. A technician working at a food company is interested in the nutritional content of seeds/
Vladimir79 [104]

Answer: Sample 1 then, has more variety of proteins but less quantity of each one, while sample 2 has less variety but more quantity of the two proteins present.

Explanation:

Proteins are molecules found in the cells of all living organisms. A protein is composed of monomers called amino acids linked together by peptide bonds. To analyze proteins, a technique called SDS-PAGE (sodium dodecyl sulfate polyacrylamide gel electrophoresis) is used. <u>This technique is used to separate proteins according to their electrophoretic mobility, depending on polypeptide chain length, molecular mass, post-translational modifications and other factors</u>. SDS (sodium dodecylsulfate) is an anionic surfactant compound that breaks non-covalent bonds in proteins, denatures them causing these protein molecules to lose their native conformation and provides the polypeptide with a negative charge that is proportional to the chain length (the number of amino acids) and, therefore, to the molecular mass of the protein. The electrostatic repulsion created by the binding of SDS to the protein is one of the causes of the protein losing its native conformation, thus eliminating the differences in conformation of the different proteins to be separated in the gel.

An electric current is applied to the gel where the proteins are seeded, causing the negatively charged proteins to migrate through the gel in the direction of the anode (positively charged region). Short proteins will move more easily and faster through the pores of the gel, while larger proteins will find it more difficult to do so. After a certain time, the proteins will have migrated according to their size (measured in kDa or kiloDaltons). After electrophoresis, the gel should be stained with Coomassie blue or silver stain, allowing visualization of the separated proteins. After staining, the different proteins will appear as distinct bands on the gel. In addition, the higher the amount of a protein, the more intense the color of its band will be.

Extract No. 1 shows three bands: 25, 30 and 35 kDa. <u>This means that it has three different proteins</u>, each with a different molecular weight. Extract number 2 shows two bands: 25 and 35 kDa. <u>It means that this sample has only 2 proteins. And being bands of higher intensity, we can say that there is more of each protein.</u>

Sample 1 then, has more variety of proteins but less quantity of each one, while sample 2 has less variety but more quantity of the two proteins present.

8 0
2 years ago
The most important difference between primary cells and secondary cells is Select only the best answer: primary cells exhibit a
torisob [31]

Hi there! This question is a bit confusing.

Primary cells more of have one "star" quality; they are not rechargable. Think of them like a battery in a TV remote! You replace them, they can't recharge.

Secandary cells, though, can be electrically recharged! Like your phone battery, plug it in and a few hours later, full battery.

Your answer would be "Secondary cells are rechargable"

Have a great rest of your day!

4 0
2 years ago
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