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Doss [256]
2 years ago
6

Why are telomeres problematic for eukaryotic chromosome replication? a) They are highly repetitive and thus hard to replicate co

rrectly. b) Telomerase is more error-prone than the normal DNA Polymerase. c) The T loop blocks formation of primers on the lagging strand. d) Removal of the lagging strand primer leaves a gap in the one of the strand's DNA sequences. e) Maintaining very long telomeres promotes cancer cell formation.
Biology
1 answer:
Natalka [10]2 years ago
4 0

Answer: Option E

Maintaining very long telomeres promotes cancer cell formation.

Explanation:

Telomere refers to either of the sequences of DNA at each end of a eukaryotic chromosome.

Usually, in eukaryote chromosome replication, telomeres are not replicated.

Hence, they are usually lost resulting in the shortening of the telomere ends after repeated cycle of cell division. This also leads to cell aging and stoppage of cell division.

The shortening of telomere combined with stoppage of cell division, and cell aging initiation prevent CANCER, which thrives on lengthy telomeres

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Lactose is a disaccharide formed by the formation of a ________ bond between glucose and ________.
alexira [117]

Answer:

glycosidic; galactose.

Explanation:

Lactose is also known as table sugar. Lactose is present naturally in milk and a water soluble sugar.

Lactose is a disaccharide sugar made up of glucose unit. The lactose consists of glucose and galactose linked through the beta 1,4 glycosidic linkage.

Thus, the correct answer is option (2).

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A normal bacterial cell carries on the chemical reaction A----------->B. A certain mutant bacterial cell cannot produce subst
vampirchik [111]
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Dr. Kettlewelll predicted that clean forests would have _____________ colored moths, and polluted forests would have _________ c
Mashcka [7]

Answer:

Kettlewell thought that if natural selection caused the change in the moth population, the following must be true: Heavily polluted forests will have mostly dark peppered moths. Clean forests will have mostly light peppered moths. Dark moths resting on light trees are more likely than light moths to be eaten by birds.

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2 years ago
Rattlesnake venom contains a collection of different enzymes, from phospholipases (which hydrolyze phospholipids into fatty acid
zhenek [66]

Answer:

Lipid bilayer

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The snake venom has phospholipase enzymes that digest the phospholipids into fatty acids. Digestion of phospholipids of the lipid bilayer of red blood cells would cause leakage of their content into the surroundings and loss of integrity of cells.

8 0
2 years ago
NADH and FADH2 are both electron carriers that donate their electrons to the electron transport chain. The electrons ultimately
maria [59]

Answer:

Explanation:

NADH and FADH2 are both electron carriers of the electron transport chain. NADH gives up its electrons starting from Complex I, which has a higher energy level compared to other complexes. Energy is given off to pump protons across the membrane by the time electrons are transferred to ComplexIII. More electrons are pumped across the membrane as electrons move to Complex IV. Because NADH commenced giving up its electrons from Complex I (higher energy level complex), more protons are pumped across the membrane gradient, which enables ATP synthase with more power to produce 3ATP molecules per NADH molecule.

On the other hand, 2 molecules of ATP are generated by FADH2 because it starts by giving up its electrons to ComplexII. It missed a chance to pump protons across the membrane when it passed Complex I. By the time the electrons reach Complex IV, less protons have been pumped. The lesser the protons to power ATP synthase, the lesser the ATP molecules produced.

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