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Andrej [43]
3 years ago
10

Which of the following molecules is/are most likely to have selective proteins in the BBB to facilitate its passage into the bra

in? a. Antibodiesb. Starchc. Amino acidsd. Urea
Biology
2 answers:
ANEK [815]3 years ago
8 0

Answer:

The correct answer is option - C amino acids.

Explanation:

The blood brain barrier or BBB is border that separates extracellular fluid in the central nervous system (CNS) and the blood that is circulating from the brain.

This barrier is allows the passage by facilitate diffusion (passive diffusion) and through the selective proteins of molecules such as glucose, amino acids that are essential for the neural function.

Thus, the correct answer is -  amino acids.

icang [17]3 years ago
3 0

Answer:

c. Amino acids          

Explanation:

             BBB stands for the blood brain barrier. The proper functioning of the brain is meant by the amino acids. Amino acids are most necessary for  production of proteins which are essential for the working of any cell.

           In general antibodies and large polysaccharides like starch are too large and are not able to cross the blood-brain barrier. Whereas urea does not have specialized proteins and therefore they cannot enter the brain.

Hence the correct option is (c).

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Which organisms have groups of cells arranged into organs
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Answer:

The correct answer is multicellular organisms.

Explanation:

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Since, unicellular organisms do not have more than one cell, unicellular cells do not form tissues and lack organs.

Thus, the correct answer is multicellular organisms.

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Hope this helped!!
5 0
3 years ago
Red-green color blindness is due to a mutant gene in the X chromosome. An XX female with normal color vision and an XY male with
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Red-green color blindness is due to a mutant gene in the X chromosome. An XX female with normal color vision and an XY male with normal color vision have a child with karyotype XXY who is color blind. The likely explanation is that the:_--------.

father was heterozygous for the color-blindness mutation.

mother was heterozygous for the color-blind mutation.

father had CNV of the color-blind mutation.

mother had CNV of the color-blind mutation.

None of the other answer options is correct.

Answer:

mother was heterozygous for the color-blind mutation.

Explanation:

Colorblindness is a recessive disorder. This means that it is expressed only in homozygous genotypes. The responsible gene is present on the X chromosomes. A colorblind female would have the genotype X^cX^c where c is the recessive allele of the gene present on the X chromosome responsible for color blindness. A female with genotype X^cX would have normal visible but would serve as a carrier.

Both the female and the male have normal genotype. Since they had a colorblind child, it means that the female was a heterozygous carrier for the trait and imparted the responsible allele to the child. The male can not serve as a carrier for X linked recessive disorder since they have only one copy of the X chromosome. Therefore, the female was a heterozygous carrier.

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3 years ago
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