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tamaranim1 [39]
3 years ago
12

Select all that apply.

Biology
2 answers:
-BARSIC- [3]3 years ago
4 0

coal and oil

all the rest are clean forms of energy

DaniilM [7]3 years ago
4 0

Hey there!

<em>Coal and Oil</em> are the forms of powering energy that hurt the Earth. However, many people use these forms of energy, because they are cheap and inexpensive. They are easy to come by, meaning the world suffers more.

Hope this helps!

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If the DNA content of a diploid cell in the G1 phase of the cell cycle is x, then the DNA content of the same cell at metaphase
REY [17]

Answer:

d. 2x.

Explanation:

At metaphase the DNA chromatides are duplicated. This explains that if in G1 phase of the cell cycle the DNA content is x, then the content in metaphase of meiosis I is 2x.

5 0
3 years ago
Which of the following is NOT a characteristic of all living things?
Maslowich

Answer:

Ability to move is the answer

8 0
3 years ago
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Disulfide Bonds Determine the Properties of Many Proteins Some natural proteins are rich in disulfide bonds, and their mechanica
Viktor [21]

Answer:

Part A - Increases the mechanical strength of protein

Part B - Disulfide bonds in the BPTI cysteines residues prevent protein from changing its structure and form

Explanation:

Remaining part of question

Part B

Most globular proteins are denatured and lose their activity when briefly heated to 65 degree C. However, globular proteins that contain multiple disulfide bonds often must be heated longer at higher temperatures to denature them. One such protein is bovine pancreatic trypsin inhibitor (BPTI), which has 58 amino acid residues in a single chain and contains three disulfide bonds. On cooling a solution of denatured BPTI, the activity of the protein is restored. What is the molecular basis for this property?

Solution

Part A

Disulfide bonds are covalent bonds which are much stronger than the non-covalent forces in protein i.e hydrogen bonds, weak wander vaal forces etc. Being strong in nature, the disulfide bonds causes cross linking between the chains of protein. This cross linking develops strong bonds that enhance the stiffness and hardness of the protein thereby increasing its mechanical strength. Stability increases because the entropy decreases.  

Part B

The disulfide bonds with in the BPTI’s three adjacent cysteines, prevents the protein from changing its structure to any stable form and hence prevent it from folding and unfolding completely

6 0
3 years ago
Select choices that result from hydrogen bonding.
Pepsi [2]
A hydrogen bond is an intermolecular force (IMF) that forms a special type of dipole-dipole attraction when a hydrogen atom bonded to a strongly electronegative atom exists in the vicinity of another electronegative atom with a lone pair of electrons. Intermolecular forces (IMFs) occur between molecules. Other examples include ordinary dipole-dipole interactions and dispersion forces. Hydrogen bonds are are generally stronger than ordinary dipole-dipole and dispersion forces, but weaker than true covalent and ionic bonds.
8 0
3 years ago
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Mamont248 [21]

Answer;

B. Placing used needles in a sharps container.

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-Engineering controls are methods that are built into the design of a plant, equipment or process to minimize the hazard. Engineering controls are a very reliable way to control worker exposures as long as the controls are designed, used and maintained properly. The basic types of engineering controls are: process control, enclosure and/or isolation of emission source, ventilation.

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3 years ago
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