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3 years ago

How does the structure of a cell suggest its function? List three examples

2 answers:

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Answer: Living things are placed into groups based on both structural and functional similarities. For example, bacteria are prokaryotic cells, which means they lack a true nucleus. Cytoplasm Functions. Some of these processes include protein synthesis, the first stage of cellular respiration (known as glycolysis), mitosis, and meiosis. In addition, the cytoplasm helps to move materials, such as hormones, around the cell and also dissolves cellular waste.

Explanation:

den301095 [7]3 years ago

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Answer:

A general concept in biology is that how the shape influences activity. The shape of different cells determines their activity. Some of the examples of the cells showing that how the shapes of the specific kinds of cells assist them to perform their unique role are as follows:

1. Red blood cells: These cells are shaped like a flat disc that comprises a divot in the middle. It permits the blood to be squishy so that to get squeezed via the arteries and veins. This helps them to transport nutrients and gases all through the body.

2. Nerve cells: These cells comprise long spindles, which are known as axons. These axons are required to belong as they transmit electrical signals all through the body.

3. Intestinal lining: The cells situated within the intestine are lined with numerous cilia. This enhances the surface region so that more nutrients can be captivated from the food, which is going through.

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El mecanismo por el cual el calor se transfiere de un objeto a otro a través de colisiones de partículas se conoce como conducción. En conducción, no hay transferencia neta de material físico entre los objetos.

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3 years ago

Which main-sequence on the Hertzsprung-Russell diagram are the least massive?

xxTIMURxx [149]

The Hertzsprung-Russell diagram is one of the most important tools in the study of stellar evolution. Developed independently in the early 1900's by Ejnar Hertzsprung and Henry Norris Russell, it plots the temperature of stars against their luminosity (the theoretical HR diagram), or the color of stars against their absolute magnitude

Depending on its initial mass, every star goes through specific evolutionary stages dictated by its internal structure and how it produces energy. Each of these stages corresponds to a change in the temperature and luminosity of the star, which can be seen to move to different regions on the HR diagram as it evolves. This reveals the true power of the HR diagram – astronomers can know a star’s internal structure and evolutionary stage simply by determining its position in the diagram.

The Hertzsprung-Russell diagram the various stages of stellar evolution. By far the most prominent feature is the main sequence (grey), which runs from the upper left (hot, luminous stars) to the bottom right (cool, faint stars) of the diagram. The giant branch and supergiant stars lie above the main sequence, and white dwarfs are found below it.

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3 years ago

Read 2 more answers

Which of the following does NOT characterize proteins?

8090 [49]

Answer:

The answer is C) They appear to be the molecular carriers of coded hereditary information.

Explanation:

Why NOT C) They appear to be the molecular carriers of coded hereditary information?

This is the job of the nucleic acids. It is composed of nucleotides which are the basic units of DNA and RNA. They carry genetic information about a certain organism.

<h3 /><h3>True of proteins:</h3>

A) They may be denatured or coagulated by heat or acidity.

Denaturation is the destruction of the protein's secondary and/or tertiary structures. The primary structure is not disrupted due to the tough peptide bonds and can only be broken down by acid. For heat denaturation, hydrogen bonds are destroyed, as in cooking of egg whites and medical equipment sterilization.

B) They have both functional and structural roles in the body.

There are many kinds of proteins that have functional and structural roles like hormones (FSH, LH), antibodies (IgA, IgM), enzymes (lipase, amylase), for storage/transport (hemoglobin, ferritin), and locomotion (actin, troponin).

D) Their function depends on their three-dimensional shape.

Just like hemoglobin, it's quaternary structure can carry 4 molecules of iron in one go. Enzymes are shaped accordingly to fit a specific substrate (lock-and-key model)

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3 years ago

Describe one way the skeletal system helps the circulatory system function

Musya8 [376]

There are several ways;

The Skeletal system protects for example the heart and several aspects of large vasculature. The skeleton also has the means to produce blood cells in the marrow of some of the bones.

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2 years ago

What is true about heart valves?

NemiM [27]

C.they separate atria from ventricles, and ventricles from the large arteries that leave them.

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3 years ago