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alisha [4.7K]
2 years ago
7

Multiple Select Question

Biology
1 answer:
Diano4ka-milaya [45]2 years ago
6 0

The TRUE statements are 'proteins often have more than one transmembrane domain'; 'they are regions of a transmembrane protein that actually pass through the lipid bilayer' and 'they are usually shaped like alpha-helices'.

A transmembrane domain is a membrane-spanning region within a protein. The transmembrane domains are hydrophobic regions that can be inserted into the cell membrane.

The transmembrane domains are usually shaped like alpha-helices.

This secondary structure (alpha-helices) causes the amino acid R-groups to project radially, thereby these side chains can interact with each other.

Proteins need only a single transmembrane domain to be anchored to the membrane, but they often have more than one.

For example, Acyl-coenzyme A cholesterol acyltransferases 1 and 2 (ACAT1 and ACAT2)  have multiple transmembrane domains.

The transmembrane domains are regions of a transmembrane protein that actually pass through the lipid bilayer.

These domains contain amino acids with hydrophobic R-groups that pass through the membrane and interact with the hydrophobic tails of the fatty acid chains present in the lipid bilayer.

The transmembrane domains anchor transmembrane proteins to the lipid bilayer.

The interactions between amino acids of the transmembrane domains and fatty acids in the lipid bilayer help to anchor transmembrane proteins and stabilize the cell membrane.

Learn more in:

brainly.com/question/9444547?referrer=searchResults

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The system that controls and coordinates the body through hormones is the ________.
butalik [34]

The system that controls and coordinates the body through hormones is the <span>endocrine system.</span>

<span>Endocrine system produces hormones and then these hormones transmit the messages to various cells within the body. Hormones have great importance in our body system and even our body is functioning due to hormones.  If hormones are disturbed it can lead to many diseases.</span>

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3 years ago
The<br> of the Earth on its axis causes
egoroff_w [7]

Answer:

Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere

Explanation:

6 0
3 years ago
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What is the term used for the building blocks of proteins?
Nataly_w [17]

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amino acids

Explanation:

8 0
2 years ago
According to the cell theory, which structure contains cells? A)blood B)water C)carbon dioxide D)chromosome
MrRa [10]

The correct answer is option A, that is, blood.  

Cell theory in biology refers to the universally acknowledged scientific theory that living species are constructed of cells, that is, they are the basic fundamental and structural unit of all species, and that all the cells arises from the pre-existing cells. The theory is credited to Schwann and Schleiden. The three postulates of the theory are:  

1. All living species comprises of one or more cells.  

2. Cell originate from the pre-existing cells.  

3. The cells is the fundamental unit of organization and composition in organisms.  


6 0
3 years ago
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In which of the following situations is evolution by natural selection most likely to occur?
Varvara68 [4.7K]

Answer:

b.

Explanation:

Natural Selection refers to the survivability of organisms based on different traits or genes that they have which then get passed on to their offspring. Based on this information we can say that a population of mountain gorillas in which individuals with genes for long hair survive the cold better is the situation in which natural selection is most likely to occur. This is because longer hair in this scenario is a gene that drastically affects the chance of survival for the gorillas and will most likely be passed on to their offspring.

I hope this answered your question. If you have any more questions feel free to ask away at Brainly.

3 0
3 years ago
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