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Nimfa-mama [501]
3 years ago
6

You are observing a sample of cells in the lab to determine why they did not divide properly. You notice that the chromosomes ar

e lined up in the middle of the cell, and the spindle fibers have extended towards them, but have not attached. What could be damaged?
Biology
1 answer:
Mandarinka [93]3 years ago
3 0

Answer:

The kinetochore of the chromosomes

Explanation:

<em>What could be damaged that is hindering the spindle fibers from attaching to the chromosomes are the kinetochores of the chromosomes.</em>

At the metaphase stage of the cell division, the chromosomes align at the equator of the cell and the spindle fibers engage each chromosome at a region known as the kinetochore.

The kinetochore is made up of complex proteins and lies around the centromere region of the chromosome. The microtubules of the spindle fibers attach to this region during the metaphase stage.

<u>If the kinetochore is damaged, it means the spindle fiber will not be able to attach to the chromosome. </u>

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In a nucleotide, the nitrogenous base is attached to the sugar's _____ carbon and the phosphate group is attached to the sugar's
LUCKY_DIMON [66]

Answer:

A. 1' ... 5'

Explanation:

The pentose sugars present in nucleotides have five-carbon structures. Other components of a nucleotide are a phosphate group and a nitrogenous base. The nitrogenous base in a nucleotide can be a purine or pyrimidine. The purine bases are covalently joined to the 1' carbon atom of the pentose sugar at their N-9. The bond between the nitrogenous base and a pentose sugar is called the N-beta glycosyl bond.

Similarly, N-1 of a pyrimidine base is covalently linked to the 1' carbon of the pentose sugar. The phosphate group of a nucleotide is bonded to the 5' carbon of the pentose sugar.

8 0
3 years ago
Which pair best matches a type of land covered with inappropriate land use?
gladu [14]

Answer:

<h2>C, RANGLELAND</h2>

Explanation:

Rangeland can be described as a land which consists of grasses, shrubs, woods, wetlands etc which are ideal for the grazing of domestic and wetland animals. Hence, a rangeland is used for grazing livestock. Hence, option C is correct.

Other options, like option D, is not correct because an urban land supports city life. It is not ideal for the growing of crops as it contains pollution of the city.

3 0
3 years ago
Read 2 more answers
In amino acid monomers, the side group (R) is covalently bound to:
marissa [1.9K]

Answer:

a. The alpha-carbon

Explanation:

An amino acid is an organic molecule that contains a carboxyl (COOH) and a amino (NH2) group. It has a central carbon called as alpha carbon.

The carboxyl and amino groups are attached to the the alpha carbon. Apart from them, a side chain denoted by "R" is also covalently attached to it. Side chain varies in each amino acid and it imparts the unique properties to the particular amino acid.

4 0
3 years ago
Based on the literature, you hypothesize that students in traditional biology lectures will have the same grades as students in
zalisa [80]

Answer:

See the answer below

Explanation:

<em>The observation allows one to make a conclusion based on the hypothesis.</em>

From the observation that the grades in the traditional lectures are significantly different from the grades in the online lectures, the hypothesis that students in traditional biology lectures will have the same grades as students in online biology lectures would be rejected.

The observation of the significant difference, thus, helps to reject the initial hypothesis, also known as the null hypothesis.

6 0
3 years ago
Which statement describes how photosynthesis and cellular respiration are interrelated?
padilas [110]

Answer:

Photosynthesis releases energy, while cellular respiration stores energy. Photosynthesis used carbon dioxide, while cellular respiration produces carbon dioxide. Cellular respiration stores ATP, while photosynthesis releases ATP. Cellular respiration produces oxygen, while photosynthesis uses oxygen.

8 0
3 years ago
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