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klio [65]
2 years ago
13

The model below shows the structure of a portion of a plasma membrane in an animal cell. The model shows the structure of a port

ion of a plasma membrane in an animal cell. None of the parts are labeled, but the model includes a phospholipid bilayer that contains some embedded proteins. The phospholipids are arranged with their heads oriented toward the external and internal membrane surfaces and their fatty acid tails oriented toward the center of the membrane. Which statement best explains the orientation of the phospholipid molecules in this model?
Biology
1 answer:
Romashka-Z-Leto [24]2 years ago
3 0

Answer:

The amphipathic property of the phospholipids that constitute the membrane

Explanation:

It seems like a options-based answer so it would be better if they were included here but basically, each of those phospholipid molecules has two parts with antagonistic reactions towards water.

The head is polar or hydrophilic, wich means it can be sorrounded by water. The tail, is apolar or hydrophobic which means it is repelled by water.

The interior and exterior of the cell is contain water-based substances, that's why the heads of the phospholipids are oriented like that with the tails protected inside the membrane.

This double layer structure has a fundamental role in the fluid property of the cell membrane from which derive most of it's functions.

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Por qué las plantas de regiones lluviosas tienen en sus hojas abundantes estomas?
vlada-n [284]

Si el agua es abundante (no limitante), entonces las plantas pueden tener más estomas, lo que permite un mayor acceso al agua (y los iones de hidrógeno necesarios), y un mayor apoyo para los tejidos herbáceos.

Espero que esta respuesta sea correcta :)

8 0
2 years ago
In the experimental labster simulation, kidney cells were treated with a chemical for different amounts of time. The number of d
Fittoniya [83]

Answer:

B. similar to the cells just treated with the dye - 0% dead

Explanation:

According to this question, an experiment was set up in which kidney cells were treated with a chemical for different amounts of time. Hence, the independent/manipulable variable is the CHEMICAL.

Based on the observation of the group of cells, a cell that has been damaged by the chemical will appear pink when treated with dye while a cell treated with only due but no chemical will not appear pink.

A NEGATIVE CONTROL is the group in an experiment that is not treated with the independent variable i.e. doesn't receive experimental treatment. Since the independent variable in this experiment is the CHEMICAL, the negative control will be the group that doesn't receive the chemical treatment. Hence, the negative control is similar to the cells just treated with the dye - 0% dead

4 0
2 years ago
Which of the following is a method used to prevent soil depletion?
ratelena [41]
<span>The best method used to prevent soil depletion would be contour farming. 

In contour farming, the land is tiled in consistent elevation. Contour farming is efficient in reducing soil depletion because it can conserve rain water and reduce the erosion of soil. 

If there is no contour farming in your option, then choose A. Adding fertilizer. </span>
7 0
2 years ago
Read 2 more answers
What is the correct complimentary strand for the following DNA?ATCGAG
Mazyrski [523]
DNA Complement: TAGCTC
RNA Complement: UAGCUC
5 0
2 years ago
What is the significance of understanding changes to the information stored in DNA?
Otrada [13]

Answer:

DNA is essentially a storage molecule. It contains all of the instructions a cell needs to sustain itself. These instructions are found within genes, which are sections of DNA made up of specific sequences of nucleotides. In order to be implemented, the instructions contained within genes must be expressed, or copied into a form that can be used by cells to produce the proteins needed to support life.

The instructions stored within DNA are read and processed by a cell in two steps: transcription and translation. Each of these steps is a separate biochemical process involving multiple molecules. During transcription, a portion of the cell's DNA serves as a template for creation of an RNA molecule. (RNA, or ribonucleic acid, is chemically similar to DNA, except for three main differences described later on in this concept page.) In some cases, the newly created RNA molecule is itself a finished product, and it serves an important function within the cell. In other cases, the RNA molecule carries messages from the DNA to other parts of the cell for processing. Most often, this information is used to manufacture proteins. The specific type of RNA that carries the information stored in DNA to other areas of the cell is called messenger RNA, or mRNA

Explanation:

6 0
2 years ago
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