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4 years ago

A functional group on an amino acid that is polar and can become positively charged: ___________

Biology

1 answer:

tia_tia [17]4 years ago

3 0

Answer:

Amino group (NH3)

Explanation:

The amino acids have a central carbon atom to which four functional groups are bonded. These are namely a carboxyl group (COOH), an amino group (NH3), a hydrogen atom and an R group (it varies for different amino acids).

Amino group (NH3) is common to all the standard 20 amino acids. NH3 is a polar group since higher electronegativity of nitrogen atom allows it to pull the shared electrons of the covalent bonds towards itself. It makes the nitrogen atom of amino group partially negative and the hydrogen atoms carry a partial positive charge (a dipole is present).

Amino group (NH3) accepts one proton and becomes positively charged (NH4+).

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An organisms haploid number if its diploid number is 32?

djverab [1.8K]

Answer:

The haploid (n) number would be 23 chromosomes found in the gametes, reproductive cells of sperm and ova. For the organism in this example the diploid (2n) number is 12 making the haploid (n) number would be half of that or 6 chromosomes

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3 years ago

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Marianna [84]

Answer:

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Explanation:

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3 years ago

How has the human diet changed in the last 300 years?

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A because we’ve found more food and people are getting fat

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3 years ago

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ou are given two true-breeding groups of rabbits. The first group has floppy ears and white fur. The second group has straight e

Lena [83]

Answer:

you expect to see that 75% of your F2 generation rabbits have floppy ears and 25% of your rabbits have black fur.

Explanation:

Available data:

Two true-breeding groups of rabbits.

The first group has floppy ears and white fur.

The second group has straight ears and black fur.

100% of the F1 generation has floppy ears and gray fur.

Each of these traits is determined by a single gene and undergo independent assortment.

Having this information we can infer that floppy years, expressed by F allele, might be dominant over straight ears, expressed by f allele. And that the fur color is affected by incomplete dominance, being B the allele expressing black color, b the allele expressing white color and Bb the genotype for grey color.

Incomplete dominance is a condition where neither of the alleles completely dominates over the other one. Descendents possess an intermediate phenotype between the two parental phenotypes and not the dominant one.

Cross between groups

Parental) FFbb x ffBB

F1) FfBb

Cross for the ear traits:

Parental) Ff x Ff

Gametes) F f F f

Punnet square) F f

F FF Ff

f Ff ff

F2) 75% of the progeny have floppy ears, FF and Ff

25% of the progeny have straight ears, ff

Cross for the fur color traits:

Parental) Bb x Bb

Gametes) B b B b

Punnet Square) B b

B BB Bb

b Bb bb

F2) 25% of the progeny have black fur, BB

50% of the progeny have grey fur, Bb

25% of the progeny have white fur, bb

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3 years ago

How is PVR (pulmonary vascular resistance) determined?

Alla [95]

Answer:

PVR is calculated by the formulae: $\text{Mean PVR}=\frac{\text{mean PAP-PAOP}}{\text{CO}} \times80$

Explanation:

Pulmonary vascular resistance may be defined as the resistance to blood through the pulmonary circulation.

PVR can be determined by the following formula:

$\text{Mean PVR}=\frac{\text{mean PAP-PAOP}}{\text{CO}} \times80$

Here, PAP is the pulmonary artery pressure, PAOP is pulmonary artery occlusion pressure and CO is cardiac output.

5 0

3 years ago