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balu736 [363]
3 years ago
8

True or false? most antigens are large, complex molecules that are not normally present in the body.

Biology
1 answer:
MAVERICK [17]3 years ago
4 0
The answer is true.
<span>Antigens are molecules capable to induce an immune response, "targeted" by antibodies. Antigens are usually proteins, peptides, or polysaccharides but they can combine with lipids and nucleic acids and form more complex antigens (lipopolysaccharide). Usually, antigens are exogenous (foreign substances), but sometimes are part of the host itself (in an autoimmune disease). All of them contain an epitope which is a part of an antigen that can be recognized and bound by an antibody.</span>
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Organisms having eggs and sperm are said to be:
svetlana [45]
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4 years ago
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The endoplasmic reticulum (ER) is a single membrane continuous with the nuclear envelope and a series of interconnected sacs thr
Solnce55 [7]

Answer:

The transport of proteins and other bioactive materials from endoplasmic reticulum to the nucleus without the involvement of transport vesicles is the main beneficial for the cell to be continuous with the nuclear envelop.

Explanation:

The rough endoplasmic reticulum or RER that contain ribosomes on its surface is directly continuous with membrane of nucleus.

     This helps nucleus to gain access to the proteins and other materials generated within endoplasmic reticulum.

   If endoplasmic reticulum faces biological problems such as unfolded protein accumulation in the ER is hazardous to the cell.During such circumstances ER send specific signal to the nucleus.

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Which of the following statements is true of cyclin-dependent kinases? O O O O O They regulate the cell cycle by phosphorylating
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Answer:

They regulate the cell cycle by phosphorylating other proteins

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