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Nookie1986 [14]
3 years ago
6

Nutrients enter a cell ______ the concentration gradient by the process of _______.

Biology
2 answers:
EastWind [94]3 years ago
7 0

Answer: A) with; diffusion

Explanation: What is diffusion? It is the movement of a substance from an area of high concentration to one of low concentration. Where does diffusion occur? Diffusion occurs in liquids and gases since their particles move randomly. It is a crucial process for living things because it is how substances move in and out of cells.

LenKa [72]3 years ago
5 0
The correct answer is a. with; diffusion
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A new DNA strand elongates only in the 5' to 3' direction because _____.
goldenfox [79]

Answer:

d. DNA polymerase begins adding nucleotides at the 5' end of the template

Explanation:

Polymerase DNA always works in one direction, synthesizing the new 5' to 3' oriented chains and adding nucleotides to the 3' end of a new synthesis chain by forming phosphodiester bonds between the phosphate of a nucleotide and the sugar of the anterior nucleotide.  

Because DNA polymerase only acts in a 5' to 3' direction, replication along a chain, the leading chain, occurs continuously. The synthesis of the opposite chain, the delayed chain, occurs discontinuously because the DNA polymerase must wait for the replication fork to open. Over the delayed chain, short segments of DNA called Okazaki fragments (named after Reiji and Tsuneko Okazaki, the scientists who discovered these fragments) are synthesized as polymerase DNA works out of the replication fork. Ligase DNA catalyzes the covalent bonds between Okazaki fragments in the delayed chain to ensure there are no gaps in the phosphodiester skeleton. Finally, the first ones are removed and these gaps are filled by the DNA polymerase.

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3 years ago
The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called ________.
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<span>The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called as <u>chemotaxis</u>. It is a process by which inflammatory cells migrated or attracted towards other cells in the blood. It's like a phenomena of negative cells attracted to positive cells. Technically speaking, it's a movement of cells in response to chemical cells. It's an important response common in cellular biology. It's also a process by which cells translate chemical information.</span>
7 0
3 years ago
Why do plants produce less oxygen during the night?
Nikitich [7]

Answer:

D

Explanation:

Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water.

3 0
3 years ago
Read 2 more answers
He summoned to his presence a thousand hale and light-hearted friends from among the knights and dames of his court. –"The Masqu
Fiesta28 [93]
A is the answer because that is how we should understand the poetic words used by the author as it does not need to be in the dictionary
8 0
2 years ago
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During which phase of meiosis does each of the following events occur?
lubasha [3.4K]

Answer:

(a) crossing over: Meiosis I, Recombination  

(b) chromatids separate at their centromeres and migrate to opposite poles: Meiosis II, Anaphase II

(c) chromosomes become aligned in pairs at the equator: Meiosis II, Metaphase II

Explanation:

Homologous recombination is a type of genetic recombination that occurs during meiosis (formation of ovum and sperm cells). The paired chromosomes of the male and female parents are aligned so that similar DNA sequences intersect. This crossing over produces an exchange of genetic material, which is an important cause of the genetic variability observed in the offspring.

Meiosis II: Anaphase II. The centromeres separate and the daughter chromatids - now individual chromosomes - move to the opposite poles of the cell. The centromeres separate, and the two chromatids of each chromosome move toward the opposite poles in the spindle.

Meiosis II: Metaphase II. Chromosomes are accommodated in the equatorial plate of metaphase, similar to what happens in mitosis. They are attached to the already fully formed meiotic spindle. Each chromosome is aligned in the equatorial plate of the metaphase, as it happens in mitosis.

6 0
3 years ago
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