How the ozone layer contributed to the devolpment of eukaryotic ells

What are the differences between internal receptors and cell-surface receptors?

aliya0001 [1]

Answer:

Internal receptor: Internal receptors present on the cytoplasm, and also known as cytoplasmic or intracellular receptor. These Internal receptors respond to hydrophobic ligand molecules which can travel across the plasma membrane. These receptors can influence (directly) the gene expression means how much a specific protein is produced from a gene without having to pass the signal on the other receptor.

Cell-surface receptor: cell-surface receptor is present on the cell membrane is known as trans-membrane receptors. This trans-membrane receptor binds to external ligand molecules which cannot travel across the cell membrane. They are also called cell-specific proteins because they are specific to individual cell type. The cell-surface receptor has 3 main components:

1) External ligand-binding domain.

2) Hydrophobic membrane-spanning region.

3) Intracellular domain.

3 0

4 years ago

Which of the following is a greenhouse gas that is released by human activities and speeds up global warming?

Inessa [10]

carbon dioxide is released

3 0

3 years ago

Read 2 more answers

How is wind energy better than other renewable resources?

schepotkina [342]

Explanation:

Wind is a renewable energy source. Overall, using wind to produce energy has fewer effects on the environment than many other energy sources. Wind turbines do not release emissions that can pollute the air or water (with rare exceptions), and they do not require water for cooling.

3 0

3 years ago

Which description best explain the role of dna in differentiation of the cell within

exis [7]

Answer:

<em>The correct option is C) Cells do not use the same sections of DNA in the same proportions, at the same time in development, which leads to differentiation.</em>

Explanation:

All the cells in an organisms body comprise of the same DNA. However, each cell is specialized to perform a different function because a part of the DNA which is active in one cell might not be active in the other cells. In this way, cell differentiation occurs. The genes which are being transcribed in one cell type may be completely repressed in the other cell type. As a result, variations occur in the structure and function of different cells.

8 0

3 years ago

Vitamins A, D, E, and K are fat-soluble vitamins. Sort the phrases as describing vitamin A, vitamin D, vitamin E, or vitamin K.

n200080 [17]

Answer: Vitamin D deficiency causes rickets.

vitamin A deficiency causes night blindness .

Vitamin C acts as a cofactor.

Vitamin D production takes place in the skin.

Vitamin E prevents ooxidative damage to membrane lipds.

Vitamin D regulate gene expression in epithelial tissues

Vitamin A are hormone precursor and visual pigment.

Vitamin D are hormone precursor derived from a <em>steroid</em>.

Vitamin K Function in fibin formation and antioxidant.

What is vitamin?

Vitamins are organic substances that are required in small quantities in food.

--They provide several functions such as increasing the rate of metabolism in the body, strengthening the immune system, proper growth and developments of bones and other body parts, etc

.A very unique function performed by vitamins that makes it different from other nutrients is that it converts energy from other sources, such as Carbohydrates, proteins, fats and oil, into a form that is useful to the body system.

Learn more about different types brainly.com/question/1913673.

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8 0

2 years ago