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3 years ago

How are DNA and mRNA alike

1 answer:

8 0

They are composed of similar materials: DNA is a deoxyribonucleotide polymer while RNA is a ribonucleotide polymer. A nucleotide is composed of a nitrogenous base, a sugar, and a phosphate group. In ribonucleotides, the sugar is ribose, while in deoxynucleotides, the sugar is deoxyribose. Adenine, guanine, and cytosine are nitrogenous bases in both DNA and RNA, while thymine is found only in DNA and uracil is found only in RNA.

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Ok the role of the cell membrane in regulating how nutrients are gained and waste products lost.

pshichka [43]

Answer:

The cell membranes controls what goes in and out by having protein channels that perform their role accordingly sometimes like funnels and like a pump in different cases.

When a channel open in the plasma membrane it allows molecule to pass through, in this case there is no requirement for energy so it is a passive transport.

Gases and food particles broke down in water must be assimilated and waste or harmful substance and molecules must be remove. For most cells, this type of selective transport of all materials all through the cell must happen through the plasma membrane.

7 0

3 years ago

Proteins may be classified according to their three-dimensional shapes. Determine whether the following examples and description

m_a_m_a [10]

Answer:

-often function as enzymes or transport proteins ⇒ globular proteins

-peptide chains arranged in long strands, or fibers ⇒ fibrous proteins

-peptide chains highly folded into spherical shapes ⇒ globular proteins

-keratins ⇒ fibrous proteins

-hemoglobin ⇒ globular proteins

-water-soluble ⇒ globular proteins

-collagens ⇒ fibrous proteins

-insoluble in water ⇒ fibrous proteins

-generally function in structure and support ⇒ fibrous proteins

Explanation:

Fibrous proteins are composed by large polypeptide chains which interact each other and form large structures. They have water insoluble and have structural and protection functions- they are components of cells and tissues. Examples are: collagen, fibronectin, keratin, elastin, actin.

Globular proteins have a spherical compact structure in which hydrophobic aminoacids are buried inside the structure and hydrophilic aminoacids (which can interact with water molecules) are exposed to the exterior medium. For this, they are water soluble. They have often transport and catalytic functions. For example: hemoglobin, mioglobin, albumin, enzymes in general.

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3 years ago

Which Earth sphere does the following image most clearly represent?

NARA [144]

If the image contains life forms and living things, then it is the biosphere.
If the image contains frozen water bodies, such as the arctic tundra, it is the cryosphere.
If the image contains soil and other solid abiotic components of the Earth, then it is the geosphere.
If the image contains water in the liquid form, then it is the hydrosphere.

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3 years ago

Who was not part of the new government

fredd [130]

Answer:

john adams

Explanation:

6 0

3 years ago

Read 2 more answers

based on hierarchical organization, place the living systems in order from smallest to largest. blue wildebeest. blue wildebeest

Sunny_sXe [5.5K]

The correct answer is:

1 - Blue wildebeest (Connochaetes taurinus)

2 - Blue wildebeests

3 - Blue wildebeests and Black wildebeests

4 - Blue wildebeests, Black wildebeests, crocodiles, acacia trees

5 - Maasai Mara

A hierarchical organization is an organizational structure where every component of the organization is subordinate to some other component.

8 0

3 years ago