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Lynna [10]
2 years ago
8

Explain through the Watson-Crick model, the secondary structure exhibited by the nucleic acids.​

Biology
1 answer:
klemol [59]2 years ago
7 0

For example, one of the secondary structures exhibited by DNA is the famous Watson- Crick model. This model says that DNA exists as a double helix. The two strands of polynucleotides are antiparallel, i.e. run in the opposite direction. The backbone is formed by the sugar—phosphate—sugar chain.

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System contains glands that secrete hormones into the bloodstream, whereas the
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Complete question:

___BLANK___ system contains glands that secrete hormones into the bloodstream, whereas the ___BLANCK__system secretes substances through ducts.

Answer:

The ENDOCRINE system contains glands that secrete hormones into the bloodstream, whereas the EXOCRINE system secretes substances through ducts.

Explanation:

Those tissues that produce hormones might be classified as:

  1. endocrine glands (produce hormones exclusively),
  2. exocrine glands (produce hormones and other secretions),
  3. non-glandular tissues that secrete hormones but are not glands.
  • Endocrine organs, also known as ductless glands or endocrine glands, release their secretion directly to the bloodstream. Blood transport hormones to target cells, tissues, and organs, where they stimulate a change in metabolic activities
  • Exocrine glands release their secretions to a duct of different tissues where they act, such as the internal or external surface of cutaneous tissues, stomach mucose, or pancreatic ducts.
5 0
2 years ago
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Which statement is true about smaller cells A less active metabollically B having smaller nucleus and organelles C with larger n
yan [13]

Answer:

D more active metabolically

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As a result of their surface area to volume ratio, smaller living cells are more active metabolically as transport through the cell organelles occur faster

3 0
2 years ago
Match each description to the level of organization.
saul85 [17]

Answer:

Organ-  a group of tissues that work together to perform a common function

Organism- a living thing that is made out of organ systems

Organ system- a group of organs that work together

cell- the basic unit of structure and function of living things

Tissue- a group of cells that work together to perform a common function

Explanation:

8 0
3 years ago
4. During _____ both the contents of the nucleus and the cytoplasm are divided
mario62 [17]
The mitotic phase. It includes both mitosis and cytokinesis
4 0
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What types of bacteria does ampicillin target? pls answer!
postnew [5]

Ampicillin is a prescription penicillin-type antibiotic used to treat many different types of infections caused by bacteria, such as ear infections, bladder infections, pneumonia, gonorrhea, and E. coli or salmonella infection.

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3 years ago
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