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Yuliya22 [10]
2 years ago
14

Which two scientists are accredited with correctly deducing the double helix model of dna.

Biology
1 answer:
Vika [28.1K]2 years ago
4 0

Answer:

James Watson and Francis Crick

Explanation:

Watson, Crick, Franklin, and Wilkins were four scientists that discovered the double-helix structure of DNA, which served as the foundation for modern biotechnology.

Franklin used X-ray crystallography at King's College London to acquire pictures of DNA, a notion previously proposed by Maurice Wilkins. Franklin's photographs led James Watson and Francis Crick to develop their renowned two-strand, or double-helix, model.

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Place the steps of endochondral ossification in order, starting with the creation of a cartilage model and ending with the prese
Ratling [72]

The correct  steps of endochondral ossification is:

  1. A periosteal bone collar develops.
  2. spongy bone and the medullary cavity form in the diaphysis.
  3. The diaphysis center is vascularized and osteoblasts deposit osteoid over calcified cartilage matrix.
  4. The epiphyseal center is vascularized and osteoblasts deposit osteoid over the calcified cartilage matrix.
  5. The spongy bone forms in epiphysis.

<h3>Which bones grow by endochondral ossification?</h3>

Long and short bones, such as the phalanges and femur, arise from a cartilage model formed by endochondral ossification. Distinguishing between these two types of osteogenesis does not imply the existence of multiple types of bone tissue.

Endochondral ossification mainly forms in two stages: modifications of the hyaline cartilage that ends with the death of chondrocytes and invasion of osteogenic cells and their differentiation into osteoblasts in the cavities previously occupied by chondrocytes for deposition.

See more about Endochondral ossification at brainly.com/question/9211436

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4 0
2 years ago
PLEASEEEE HELPPP ASAPPPP :))
Oksanka [162]

Answer: Check for the presence of antibodies in the blood

Explanation:

A person can only have antibodies for a virus if they got the virus in the first place

8 0
2 years ago
Which of the following describes an approach used to harness wave energy?
Ivanshal [37]

Answer:

I and III

Explanation:

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5 0
2 years ago
What kind of biomolecule are enzymes typically composed of? What effect do enzymes have on their substrates and the overall reac
ivann1987 [24]

Enzymes are typically composed of amino acids.

Enzymes specifically binds to their substrate, and accelerate the biological or in-vitro reactions.

Four real-life examples of enzymes are: Lipase, Maltase, DNA ploymerase and Alcohol dehydrogenase.

Explanation:

All enzymes are proteins. They are composed of amino acids as monomer units linked by polypeptide bonds.

The substrate is a molecule which has specific enzyme binding sites for the highly specific enzyme called as active sites. With this binding, the  enzyme-substrate complex is formed, undergoes the chemical reaction and new product is formed. Enzymes accelerate the biological reactions by lowering the reaction's activation energy.

Four-real life examples of enzymes are:

Lipase enzyme: catalyses the hydrolysis of fats and triglycerides in the small intestine. Lipase enzyme is secreted by pancreas.

Maltase enzyme: catalyses the breakdown of maltose sugar. It is secreted by salivary glands and our mouths.

DNA Polymerase Enzyme: It catalyses the DNA replication in the cells. It is secreted by the nucleus

Alcohol dehydrogenase: It catalyses many reactions in the body as the reduction of NAD to NADH. It is secreted by the liver.

7 0
3 years ago
That has a single cell without a nucleus. This
hodyreva [135]
I feel like it would be Bacteria.
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2 years ago
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