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ozzi
3 years ago
11

Describe what occurs during cancer cell division.

Biology
1 answer:
Marysya12 [62]3 years ago
6 0

Answer:

Cancer cell division is mitosis. Mitosis is a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.

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Assume that the growing polypeptide chain of amino acids being produced represents an enzyme humans use to help digest starch. T
arlik [135]

Answer:

B) nuclei of gland cells.

Explanation:

DNA carries the blueprint for the production of all the proteins including enzymes in human beings. Humans are eukaryotes and their DNA is present in the nucleus of their cells. All the cells that make the complex human body are derived from division in the zygote and therefore, are genetically identical and have the same DNA.

However, gene expression is regulated by the expression of specific genes in specific cells and at a different time of developmental stages. Amylase is the enzyme that digests starch in humans. Amylase is secreted by salivary glands. So, the nuclei of these glands would have genetic information for the synthesis of amylase.

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3 years ago
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If oxygen moves from an area of high concentration outside of the cell to low concentration inside the cell, which method of mov
motikmotik

Answer:

B.) Diffusion

Explanation:

Since this is oxygen, not water, and it is going from an area of high concentration to low, it is moving with its concentration gradient, it would be diffusion. If it were water, not oxygen, then it would be osmosis, and lastly, if it were moving from an area of low to high concentration, that would be active transport. Semipermeability is a characteristic of cell membranes, not a method of movement.

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3 years ago
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HELP !!!! When adenine pairs with thymine how many hydrogen bonds are formed?
Assoli18 [71]

two hydrogen bonds are formed between adenine and thymine

8 0
2 years ago
Answers amoeba sisters: video recap meiosis
Schach [20]

1. Interphase is an important and the longest phase of the cell cycle during which the cell prepares for division by coping its DNA. It is metabolic phase of the cell, in which the cell grows, obtains nutrients and metabolizes them. There are three stages of interphase: G1 (the cell growth), S (replication of DNA, chromosomes are copied) and G2 (preparation for division). Without this phase, genetic material wouldn’t be ready for the process of meiosis  and haploid gametes couldn’t be created.

2. Homologous chromosomes are the similar but not totally identical chromosome pairs that an organism receives from its two parents. During the prophase I of meiosis they pair up: each chromosome aligns with its homologue partner via link-chiasmata ( the two match up at corresponding positions). Those homologue pairs separate during a first stage of cell division (meiosis I-reduction of chromosomes number, from diploid to haploid), while sister chromatids separate during a second stage (meiosis II).

3. Crossing over is a process in which homologous chromosomes trade their parts. Crossing over is process of genetic recombination where DNA is cut and then repaired. Cut and repair of homologous chromosomes allow them to exchange some of their genetic information. As a consequence of crossing over, new arrangement of maternal and paternal alleles on the same chromosome is achieved. It is the way to create varations.

4. During the metaphase I, homologue pairs are lined up comparing to metaphase II where individual chromosomes are lined up. It is because during the meiosis I homologue pairs separate and chromosome number reduce from diploid to haploid. On the other hand, during the meiosis II, sister chromatids separate.

5. Nondisjunction is the consequence of cell division, where there is no properly separation. There are  different forms of nondisjunction:  

• failure of a pair of homologous chromosomes to separate in meiosis I,  

• failure of sister chromatids to separate during meiosis II.

After nondisjunction, resulting daughter cells are with abnormal chromosome numbers -aneuploidy.


4 0
2 years ago
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After eating, what specific part of the nervous system controls the digestion of the
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Answer:

Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins. Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle—called the lower esophageal sphincter —relaxes and lets food pass into your stomach.

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