The cellular process of creating two new DNA molecules from one original copy is called replication. Which statement is the BEST description of this process?A: DNA opens up and RNA copies it.
B: DNA opens up and completely unwinds to make two new molecules.
C: DNA opens up and each strand is used as a template for a new strand.
D: is crossed of

Answers

Answer 1

Answer: It should be c ig. I'm not too sure

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Which aquatic biome forms where freshwater streams or rivers merge with the ocean? form where freshwater streams or rivers merge with the ocean.
Which reason best explains why living things need carbon? Carbon is a source of energy. Carbon reduces global temperatures. Carbon is an important solvent. Carbon is everywhere.
Why is burning coal a major source of pollution?
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What prefix before saccharide would you use to describe sucrose

The graph illustrates the activity level of three common digestive enzymes, across a range of pH values. Which enzyme is likely to be active in the acidic environment of the stomach?A)
pepsin
B)
trypsin
C)
amylase
D)
pepsin and trypsin

Answers

Answer: A) Pepsin

Explanation: Acidic solutions are solutions which provide H^+ ions .More is the H^+ ion concentration, more acidic is the solution.

pH of a solution is defined as negative logarithm of H^+ ions concentration.

$pH =- log{[H^+]}$ or

$pH = log(1)/([H^+])$

Thus lesser is the pH,more is the H^+ concentration and more acidic is the solution.

Thus acidic solutions have low pH and pH ranges from 1 to 7 for acidic solutions.

As can be seen from the graph, enzyme pepsin has highest activity at low pH which means in acidic solutions. As the pH is increasing or the solution is turning basic, the activity of pepsin decreases.

I think amylase as well

The fossil beds at the Falls of the Ohio, located between Louisville, Kentucky and Clarksville, Indiana, are world-renowned. There are 212 species of corals known found in these fossil beds. Consider the environmental conditions under which most coral lives. Which scenario MOST LIKELY describes the ancient environment of the Falls?a. dry, hot, and near the equator
b. temperate, northern latitudes, underwater
c. tropical, near the equator, and underwater
d. tropical, at the boundary of two tectonic plates

Answers

c. tropical, near the equator, and underwater

Fossil records are described as the position of found fossils all through the surface or the layers of the earth. The older the fossils are, the deeper it is found. Fossil records are also considered to be gathered information about the total number of the discovered fossils and the data obtained from them.

Answer:

its c. tropical, near the equator, and underwater

Explanation:

What structure acts as a selective barrier, regulating the traffic of materials into and out of the cell?

Answers

Cell membrane (plasma membrane) acts as a selective barrier, regulating the traffic of materials into and out of the cell.

The cell membrane, also known as the plasma membrane, is a crucial component of all living cells. It serves as a selective barrier that controls the movement of substances into and out of the cell. This selective permeability is essential for maintaining the cell's internal environment and regulating the exchange of nutrients, gases, and waste products. The cell membrane consists of a lipid bilayer embedded with proteins, and its hydrophobic interior prevents the passage of most polar molecules.

To facilitate the transport of specific substances, the cell membrane contains various proteins, including transport proteins, receptor proteins, and enzymes. These proteins help regulate the flow of ions, nutrients, and signaling molecules across the membrane. Overall, the cell membrane is a vital structure that ensures the cell's survival and functionality by controlling its interactions with the external environment.

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Final answer:

The cell membrane acts as a selective barrier, regulating the traffic of materials into and out of the cell.

Explanation:

The structure that acts as a selective barrier, regulating the traffic of materials into and out of the cell is the cell membrane or plasma membrane.

The cell membrane is composed of a phospholipid bilayer with embedded proteins that control the movement of substances in and out of the cell. It selectively allows certain molecules to pass through while keeping others out, maintaining homeostasis within the cell.

For example, the cell membrane regulates the entry of nutrients and gases into the cell, as well as the removal of waste products and excess substances. It ensures that the cell maintains the appropriate balance of substances for proper functioning.

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Chemically speaking, enzymes are composed of chains of _________________, and they are considered to be a type of __________________.

Answers

All proteins are composed of amino acids. Each amino acid in a protein is linked by chemical bonds. Enzymes are composed of chains of amino acids. Enzymes are a type proteins that turn a cell into a highly developed miniature factory carrying out chemical reactions very fast.

Final answer:

Enzymes are composed of amino acids and are considered to be a type of protein.

Explanation:

Chemically speaking, enzymes are composed of chains of amino acids, and they are considered to be a type of protein.

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Why is the understanding of classification an important life skill

Answers

so that you can be organized in your home or for school or work and you can categorize things to arrange them

Answer: so that you can be organized in your home or for school or work and you can categorize things to arrange them

Explanation:

The stained Gram-positive bacteria appear _____ under the microscope.blue
pink
green
yellow

Answers

Gram-positive bacteria are stained as purple because of their single thick cell wall that cannot be easily penetrated by the solvent. Meanwhile, gram-negative bacteria are decolorized because they have cell walls with much thinner layers that allow removal of the dye by the solvent. answer hence is pink.

if your doing this question on odyssey the answer is blue

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if there is no oxygen during the cellular respiration process, the Krebs cycle does not occur. True or False

Select all that apply. The two bones of the lower arm are _____. radius humerus ulna tibia femur

Imagine a close friend is planning to go out and celebrate this weekend. You know your friend intends to drink and may experiment with drugs. You are not only concerned for her wellbeing but also worried that she might get behind the wheel and drive. Using the information you learned in module 8, write a paragraph persuading your friend to make safe choices. List at least three dangers she may face and two alternatives for her to safely and legally enjoy the celebration.