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aksik [14]
2 years ago
12

In terms of bonding, explain why silicate materials have relatively low densities.

Biology
1 answer:
Brilliant_brown [7]2 years ago
3 0
<span>The bonds are covalent and, therefore, directional. They will only bond in one direction, which means that fewer electrons can bond to these materials, leading to a relatively low total number of electrons in the material, and therefore a lower overall density.</span>
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Your assignment in biology lab is to design an experiment that would detect whether a substance is breaking down, or digesting,
Elis [28]

Answer: Option B

Explanation: First we should understand the role of enzyme and acid here. Pepsin is an enzyme which will break down proteins into simple monomers (like amino acids). And, acid causes digestion which means it will break down the protein into its respective elements and compounds. Water will act as a control in this experiment.

Option B is correct because it has all three criteria-                                                                                   1. Control [water + protein]                                                                                                               2. With enzyme [egg white + pepsin]                                                                                           3. With acid and enzyme

So this will give us an idea whether pepsin alone is breaking down the protein or digesting it. And there would be difference in test tube B and C. So this will clear the difference.

Option A is incorrect because it has not mentioned any different test tube for checking what happened with the protein. And, Option C is incorrect because mass of egg white will remain same after digestion also.

6 0
2 years ago
The major difference between starch, glycogen, and cellulose and their adjacent glucose subunits is the ________.
sveta [45]

Answer:

<u>Starch</u> is the storage form of glucose (energy) in plants and the glucose molecules are linked by alpha 1,4 glycosidic linkage.

<u>Cellulose </u>is a structural component of the plant cell wall and glucose molecules are linked by beta 1,4 glycosidic linkage.

<u>Glycogen</u> is the storage form of glucose (energy) in animals and glucose molecules are linked by alpha 1,6 glycosidic linkage.

Explanation:

All of these sugars are polysaccaride sugars containing large number of glucose subunits.

Starch is a polysaccharide extracted from agricultural raw materials. It contains amylose and amylopectin. Amylose is an un-branched chain polymer of D-glucose units while amylopectin is a branched chain polymer of D-glucose units.

Glycogen is the storage form of glucose in animals, It is stored in muscles and liver and it is a branched polysaccaride.

Cellulose is the storage form of glucose in plants and leaves.

8 0
2 years ago
What would be of most importance to goblet cells and other glandular epithelia?
konstantin123 [22]

The given question is incomplete as options are not provided, however the options  are as follows :

- Golgi bodies

-lysosomes

-microvilli

-multiple nuclei

Answer:

The correct answer is - golgi bodies.

Explanation:

Goblet cells and glandular epithelial cells are cells that produce and secretes a specific type of products that are termed as the mucin to protect the skin and layer mucous membrane they place.

These cells are characterized by a large amount of Golgi body and endoplasmic reticulum as they are involved in the exocytic pathway which means they secrete, glycoproteins, mucin, and other substances. Golgi bodies needed to modify, synthesis, and secretion.

Thus, the correct answer is - golgi bodies.

7 0
2 years ago
The grades of a science test are normally distributed. Thanh finds that his grade on the test has a z-score of –2.5. Which of th
Tom [10]

The right answer is Thanh's grade is 2.5 standard deviations below the mean of the test grades.

The z scores are standard deviations. If, for example, a tool returns a z score of +2.5, it means that the result is a standard deviation of 2.5.

Very high or very low (negative) z scores associated with very low p values are at the ends of the normal distribution.

3 0
2 years ago
Read 2 more answers
Which of the following correctly rank the steps in erythrocyte glucose transport by GLUT1? I. Glucose binding results in a confo
3241004551 [841]

Answer:

Following are the correctly rank steps:  

1. The binding of glucose takes place with the transporter on one side of the membrane.  

2. The binding of glucose leads to a conformational change, which opens the site of binding on the contrary side of the membrane.  

3. The dissociation of glucose takes place.  

4. The transporter moves back to the beginning conformation.  

3 0
2 years ago
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