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JulijaS [17]
4 years ago
14

Give an example in the human body of a molecule cotaining ionic bonds

Biology
1 answer:
Lemur [1.5K]4 years ago
3 0
<span>An ionic bond is a complete transfer of electrons from one atom to another. This generally happens between atoms that have opposite electronegativity. This means one has very few atoms in their outer shell, while the other has many. A common example of an ionic bond is that of salt, with Na and Cl. Sodium has one electron in its outer shell, in which it transfers to chloride to make an ionic bond.
</span><span>
Ionic bonds are usually found in dry forms such as salts and are found in compounds throughout the human body. Ionic compounds are generally water soluble.</span>
DNA<span> - As you recall, DNA is formed in the shape of a double helix. The double strands of DNA are held together by hydrogen bonds. Each single strand has a backbone made of sugar and phosphate, as well as either a purine (adenine or guanine) or pyrimidine (cytosine or thymine). Each purine is connected to a pyrimidine through a hydrogen bond, giving the double DNA strand strength, and flexibility. This bond holds the two sides of DNA together, each bond contributing to the overall strength of DNA. When DNA is replicated, special enzymes known as DNA helicase "unzip" DNA and these bonds are broken so the two strands can be individually replicated.</span>

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I don't know how to edit my original question, so I am resubmitting it. I have attached a photo with my question. I had it attac
Mumz [18]

Answer:

The correct answer is -

A: Prophase  (top left)

B: Cytokinesis  (top middle)

C :Interphase  (top right)

D :Telophase  (bottom left)

E: Metaphase  (bottom middle)

F: Anaphase (bottom right)

Explanation:

A. prophse - the first stage of mitosis, in this pahse the chromatin which is DNA and proteins, condenses in nucleus.

B. Cytokinesis  - It is the physical sepration or dividion of cytoplasm of the parental cell.

C. Interphase - This phase have no change in cell except its size as it grows and enlarges itself.

D. Telophase - formation of a nuclear membrane around chromosome set to separate the genetic material from the cytoplasm.

E. Metaphase - visible chromosomes, removal of nucleus and chromosomes present in cytoplasm.

F. Anaphase - replicated chromosomes are separated and move towards opposite poles.

7 0
4 years ago
_____ can be prescribed to therapeutically lower cholesterol levels.
maxonik [38]

Answer:

Niacin  can be prescribed to therapeutically lower cholesterol levels.

Explanation:

Niacin, known as vitamin B3, is used to reduce the risk of heart attack or stroke in people with high cholesterol. Niacin has gained popularity in the last 50 years and is mainly used to raise the level of HDL (high density lipoprotein) cholesterol, also known as good cholesterol and lowering bad cholesterol levels.

However, niacin can cause health damage, so it should always be used with medical supervision.

7 0
4 years ago
What section of dna are used in dna fingerprinting
Alja [10]

Answer:

<em><u>R</u></em><em><u>epetitive DNA sequences "minisatellites." The two major uses for the information provided by DNA-fingerprinting analysis are for personal identification and for the determination of paternity. DNA fingerprinting is based on DNA analyzed from regions in the genome that separate genes called introns.</u></em>

7 0
4 years ago
Boxlike shape, green organelles, and a nucleus off to the side. what type of cells were these?
Black_prince [1.1K]
They're plant cells. The green organelles should be chloroplast. They're responsible for photosynthesis.
6 0
3 years ago
1. Which of the components could be observed using a microscope in a prepared slide of "Leaf" epidermal cells but not in a prepa
grigory [225]

1. The correct answer is option (B) Component 3 and 4 only. The difference between the plant cell and an animal cell is the presence of the cell wall and the plastids called the chloroplasts in the plant cells. Cytoplasm is the jelly like substance present in both the plant cells and animal cells. Nucleus is the brain of the cell regulating the metabolic activities of the plant and animal cell. Cell membrane is the semi-permeable membrane covering all the cells.

2. The correct answer is option (D) Biomagnification leads to higher toxicity in tuna. Biomagnification is the accumulation of toxic substances at different tropic levels of the food chain. Fishes are a target of biomagnification due to the intake of the methyl mercury in them.

3. The correct answer is option (B) 1. Prokaryotic cells 2. Eukaryotic cells. The image 1 is a prokaryotic cell and the image 2 is a eukaryotic cell. Prokaryotes are the cells with primitive nucleus. They do not have a well-defined nucleus and the membrane bound organelles. Eukaryotes are the cells with a well-defined nucleus and all the membrane bound organelles.


4 0
3 years ago
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