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Nata [24]
3 years ago
10

What is the role of NaCl and edta in DNA isolation?

Biology
1 answer:
Alex3 years ago
5 0
<span>NaCl provides Na+ ions that will block the negative charge from phosphates on DNA.

Negatively charged phosphates on DNA cause molecules to repel each other. The Na+ ions will form an ionic bond with the negatively charged phosphates on the DNA, neutralizing the negative charges and allowing the DNA molecules to come together</span>
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Natural Bridge Cavern was formed by water that seeped into the soft limestone in central Texas. What is this process called?
Mamont248 [21]

Answer:

Chemical weathering

Explanation:

Chemical weathering is the process when rain chemicals react with rocks and minerals. In this process, the rocks are weakened. This chemical happening provokes the chemical reaction in the rock or in the mineral.

Chemical weathering is a spontaneous process and it leads to a more stable state for natural materials under a given set of conditions.

7 0
3 years ago
Which organelle is the location of protein synthesis? (4 points)
raketka [301]

Answer:

Ribosome

Explanation:

Ribosomes are mainly made up of ribosomal RNA and ribosomal proteins. Each has two subunits (30S and 60S or prokaryotes) and 40S and 60S in eukaryotes. The smaller unit usually reads the mRNA -with the message from the nucleus -on how to ‘manufacture’ the proteins. The larger subunit actually does the translation by bringing in t_RNAs that carry specific amino acids and then forming peptide bonds between amino acids and ultimately forming polypeptide chains.

6 0
3 years ago
Read 2 more answers
Year
Mrac [35]

Answer:

The correct choice would be: "The data supports the hypothesis because when annual temperature deviations are below normal, the annual number of hurricanes increases."

Explanation:

The large discrepancies between temperatures due to global warming promote the appearance of hurcanaes, that is, the greenhouse effect and pollution encourage the appearance of excessive thermal amplitude and this helps the appearance of hurricanes.

4 0
3 years ago
15. Stephanie made the following chart for the terrestrial planets. What correction needs to be made?
alexandr1967 [171]

Answer:

c. mars has a thin atmosphere

Explanation:

i hope that helps even though its a few days late

4 0
2 years ago
What kind of bond forms when atoms in a molecule do not share their electrons equally
Jet001 [13]

Atoms in a molecule are said to be bonded when they share pairs of electrons with each other and this type of bonding is known as covalent bonding. When they share equal number of electrons in a pair and a full electron shell is completed, they become the most stable. But when the electrons are shared unequally by the atoms in a molecule, a POLAR COVALENT BOND is said to be shared by them. This happens as a result of two atoms sharing electron with different electronegativity i.e. the tendency to attract a shared pair of electrons.

6 0
3 years ago
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