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marissa [1.9K]
3 years ago
15

Which one of the following factors significantly contributes to the ability of eukaryotic cells to complete DNA replication duri

ng the short window of time offered by S phase? Which one of the following factors significantly contributes to the ability of eukaryotic cells to complete DNA replication during the short window of time offered by S phase?
A. Eukaryotic DNA polymerases have dramatically increased processivity compared to DNA polymerases in organisms with smaller genomes.
B. Multiple origins of replication are activated per chromosome.
C. Origins of replication can initiate again after they have been replicated and before mitosis.
D. The next round of replication begins before the cell exits S phase.
Biology
1 answer:
irina [24]3 years ago
7 0

Answer:

B. Multiple origins of replication are activated per chromosome.

Explanation:

DNA replication runs in 2 directions (bidirectional), starting at the origin of replication an moving in both directions from that point. A eukaryotic chromosome may be replicating at many points along its length at any one time.

DNA is always copied in a 5´ ⇒ 3´ direction, this makes the lagging strand to be synthesized discontinuously as short okazaki fragments.

The whole process happens at the same time in both strands in a replication fork. DNA may have different replication forks at the same time to speed up the process.

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Which property results from the crystal lattice structure of ionic compounds? A. low melting point B. good electrical conductivi
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Answer:

C.) crystalline solids

Explanation:

The solid materials may be crystalline or amorphous. The concept of crystal structure is related to the organization of atoms in a geometrical form. Crystalline structures are present in various materials, where atoms distributed within their structure form a network called the crystalline lattice. Therefore, crystalline structures have salts, metals and most minerals. Crystalline structures are formed by unit cells that are their basic unit, as they constitute the smallest set of associated atoms found in a crystalline structure.

The molecules of the crystalline structures can have two types of bonds, the directional ones, which include the covalent and dipole dipole and the non-directional ones where the metallic, ionic, van der Walls bonds. When formed by ionic compounds, these crystalline structures can result in crystalline solids.

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3 years ago
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Harlamova29_29 [7]

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Explanation:

Population density is the total number of organisms per unit area. Population density is calculated by dividing the number of organisms by the unit area either in square kilometers, squaremeters, square miles.

Population density =number of organisms ÷ unit of land area.

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3 years ago
Escribe las partes de la célula:<br> Doy corona
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Answer:

A. MEMBRANA PLASMATICA

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4 0
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svet-max [94.6K]

The correct answer is D. Homeostasis and transport of molecules

Explanation:

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This complex process illustrates the transport of molecules in the cell, which refers to a mechanism that allows molecules and substances to move in and out of a cell. Moreover, this process implies molecules (in this case glucose) move to one area with a lower concentration to preserve equilibrium as shown by the diagram. Additionally, this equilibrium is part of homeostasis which is a set of mechanisms to main an equilibrium in the cell, including appropriate levels of glucose and other substances.

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3 years ago
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