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ddd [48]
3 years ago
15

True or false? Scientific models can never be changed.

Biology
2 answers:
natita [175]3 years ago
7 0

Answer:

false

Explanation:

skelet666 [1.2K]3 years ago
4 0
Answer: False (Scientific models can be changed)
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Which of the following may cause a 12-year-old to have a height above 6 feet?
Dovator [93]

Answer:

adefective adrenal gland can lead to oversecretion of growth hormones

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3 years ago
2. Protein A has a binding site for ligand X with a Kd of 10-6M. Protein B has a binding site for ligand X with a Kd of 10-9M. W
allsm [11]

Answer:

Protein B has a higher affinity for ligand C than protein A

Explanation:

Binding affinity is a measure of the strength of the bonds or interactions between a single biomolecule or receptor to its ligand. A ligand is usually a small molecule that binds to a specific receptor.

The receptor is usually a large molecule that contains a specific site for the binding of ligand.

Binding affinity is usually measured by the equilibrium dissociation constant (KD). The equilibrium dissociation constant KD is a ratio of the dissociation and the association of ligand to the receptor. The value of KD is used to evaluate and compare the strengths of bimolecular interactions.  The larger the KD value, the more weakly the target molecule and ligand are attracted to and bind to one another.

The higher the dissociation constant (KD), the weaker the affinity is between the interacting molecules, whereas, the smaller the KD value, the greater the binding affinity of the ligand for its target.

Protein B has a KD value of 10⁻⁹ M while Protein A has a KD of 10⁻⁶ M.

Ration of KD of protein B to protein A = 10⁻⁹ M/10⁻⁶ M = 10⁻³

Therefore, protein B has a KD value which is 1000 times smaller than the KD of protein A.

8 0
3 years ago
Dna is made of chains of four smaller molecules called.
lilavasa [31]

Answer:

DNA is made of chains of four smaller molecules called "Nucleotides".

Explanation:

A molecule consisting of a nitrogen-containing base (adenine, guanine, thymine, or cytosine) in DNA is known as a nucleotides.

7 0
2 years ago
Explain the structure of a mosquito briefly.​
valina [46]

Answer:

Mosquitoes have thin, long bodies and three pairs of extremely long legs. They have scales along the veins of their wings and long beak-like, sharp sucking mouth parts called a proboscis. These two features distinguish mosquitoes from other flies. Mosquitoes also have feathery or hairy antennae.

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3 years ago
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Which of the following body systems works with the circulatory system to exchange oxygen and carbon dioxide
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The respiratory system
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4 years ago
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