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Nikitich [7]
3 years ago
13

Summarize the process of DNA replication in the purpose. ASAP ( 15 points)

Biology
1 answer:
Semenov [28]3 years ago
4 0

Answer AND Explanation:

The DNA double helix consists of two long separate strands joined together by base pairs. When the molecule is due to replicate the double helix unwinds and the two strands unzip themselves. This is made possible by the weak hydrogen bonds that link the bases. The information on the DNA strands which is in form of base sequence is copied out onto a new DNA strand using the parent DNA as the template.

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Sir Issac Newton's only discovery was the three laws of motion.<br> True<br> False
mash [69]
That was sir Isaac Newton’s only discover so it is true
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2 years ago
The strong risk factors for colon cancer include which of the following? (Select all that apply.) A. Aging B. Gender C. Heredity
USPshnik [31]

Answer:

a. Aging

c. Heredity

d. Crohn disease

e. High-fat diet

Explanation:

Colon cancer involves the abnormal growth of cells in the colon found in the large intestine.

Colon cancer is found to be hereditary in about 10 percent of patients .

It is also common with individuals who are used to taking high fat diets and affects most people older than 50 years old.

Crohn’s disease is also found to be a risk factor for having colon cancer.

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2 years ago
DCCD (dicyclohexylcarbodiimide) inhibits oxidative phosphorylation when the substrate is mitochondrial NADH. DCCD is a drug that
VARVARA [1.3K]

Answer:

A) Decreases cellular energy production

B) DCCD also affects K+ transport

Explanation:

A) Consequences are of DCCD on cellular energy production: <em>Decreases cellular energy production</em>

ATP-synthase pump is composed of two subunits: F1 catalytic subunit that synthesizes ATP, and F0 proton pumping subunits, that transport H+ through the membrane. F1 subunit might act independently of F0 to produce ATP, but this molecule can not be released without H+ gradient, which generates a movement necessary for ATP release from the catalytic center.

When any of the parts composing F0 react with DCCD, the subunit can not transport H+ through the membrane. DCCD inhibits the enzyme activity by blocking the protons´ flow.

As DCCD blocks the protons´ flow, and the protons´ flow is necessary to release the ATP molecule from the F1 subunit, no other ADP + Pi can enter to F1 subunit, and the production of ATP stops.

B) Other cellular effects of DCCD

There seem to be other effects of DCCD on cell activity, some of which are still under study. To name a few:

  • Diimide from DCCD seems to stimulate cytochrome b reduction and inhibits its reoxidation by ferricyanide.
  • When exposing the cell to high concentrations of DCCD for a long time, might occur an alteration in the electron transporting chain
  • Inhibition of ubiquinol-cytochrome c reductase activity when exposing the cell to high concentrations of DCCD.
  • Inhibition of K+ transport, associated with the inhibition of H+ transport.

Concerning the effect of DCCD on the K+ transport, DCCD stops the extrusion of H+ and the consequent intrusion of K+.

DCCD strongly inhibits the simultaneous flow of H+ and K+. First, it inhibits H+ flow, acidification of the environment stops, but at this point, K+ keeps moving through the membrane. Once the H+ flow has ceased, the K+ flow slowly decreases until it finally stops moving. There is a lag time in the DCCD effect on K+ flow to the instantaneous effect on H+ flow.

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3 years ago
What boundaries create new oceanic crust?​
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________ results in the production of spores in plants. meiosis fertilization germination mitosis spermatogenesis
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