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3 years ago

I NEED HELP WITH A QUICK BIOLOGY QUESTION!

Biology

1 answer:

mylen [45]3 years ago

4 0

Answer:

The correct answer is Each nucleotide is connected to three nitrogenous bases.

Deoxyribonucleic acid (DNA) is a genetic material composed of nucleotides.
Each nucleotide is made up of three elements: a phosphate group, a sugar group (deoxy ribose), and a nitrogenous base.
There are four types of nitrogenous bases found in the DNA : adenine (A), guanine (G), thymine (T), and cytosine (C).
Phosphate binds to a sugar group with the help of ester bond and sugar binds to a nitrogenous base with the help of glycosidic bond.
Nucleotides bind with each other with the help of phospodiester bond to form the polynucleotide chain.
The two nucleotide chains are held together with the help of hydrogen bonding between nitrogenous bases of two strands. They form the double helical structure of the DNA.
The two strands lei in anti-parallel orientation.
It is also important to note that adenine always binds with thymine with the help of two hydrogen bonds and guanine always binds with cytosine with the help of three hydrogen bonds.

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balandron [24]

Hello there!!

The answer, I think, would be A.

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I hope this answers your question!

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3 years ago

Males will have chromosomes ____, while females will have ____.

sasho [114]

Answer:

Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes. This picture of the human chromosomes lined up in pairs is called a karyotype.

Explanation:

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3 years ago

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What came first? The chicken, or the egg?<br><br><br><br>:3

Novay_Z [31]

Answer:

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Explanation:

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3 years ago

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g If I see a decreased response after administration of repeated doses of a drug I might suspect that the cell has a) Up regulat

alexandr1967 [171]

Answer:

More than one of the above

Explanation:

I strongly recommend sticking with the prescribed dosage of a drug.

A drug works by binding itself to the receptor site of a cell or tissue by non-covalent interactions.

Repeated doses of the same drug however may make the drug start behaving as an inverse agonist by blocking (instead of binding) the receptor site of the cell thus inducing a reduced response instead of an increased response to the drug.

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3 years ago

In hemoglobin, the transition from t state to r state (low to high affinity) is triggered by:_________

Elena L [17]

In hemoglobin, the transition from t state to r state (low to high affinity) is triggered by Bisphosphoglycerate (BPG)

Bisphosphoglycerate (BPG), also known as 2,3-Disphosphoglycerate (2,3-DPG), aids in the transition of hemoglobin from a high-oxygen-affinity to a low-oxygen-affinity state.
2,3-BPG binds to hemoglobin, causing oxygen to be unloaded. Furthermore, 2,3-BPG reduces hemoglobin's affinity for oxygen. As hemoglobin is unloaded in our tissues, 2,3-BPG binds to it, promoting oxygen unloading.
When we increase the concentration of 2,3-BPG in our blood, the oxygen binding curve shifts to the right. This means hemoglobin will have a lower affinity for oxygen and will be able to deliver more oxygen to our body's tissues and cells.

Learn more about Bisphosphoglycerate (BPG) from here:brainly.com/question/8885734

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1 year ago