BIOLOGY COLLEGE

The majority of the protein inside a red blood cell (erythrocyte) is:a. albumin
b. hemoglobin
c. fibrinogen
d. immunoglobulin
e. porphyrin

Answers

Answer 1
Answer:

Answer: Hemoglobin

Explanation: Hemoglobin is a protein very rich in iron found in red blood cells and is responsible for the transportation of Oxygen from the lungs to the whole body. Oxygen binds to the hemoglobin in red blood cells and the red pigmentation of blood that is highly oxygenated is due to the hemoglobin content found in RBC's.

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The pedigree below concerns a certain rare disease that is incapacitating but not fatal. Determine the most likely mode of inheritance of this disease. Write the genotype of each family member according to your proposed mode of inheritance. If you were this family’s doctor, how would you advise the three couples in the third generation about the likelihood of having an affected child?

Name a metal metalloid

Answers

Answer:

boron, silicon, germanium, arsenic, antimony, and tellurium.

A genetics researcher finds that a form of human albinism in a certain population is controlled by the recessive allele, a, for the absence of skin pigment and the completely dominant allele, A, for presence of skin pigment. If the recessive allele occurs in 30% of this population, what percent of the population has skin pigment but also carries the recessive allele?21 percent
42 percent
91 percent
51 percent

Answers

Answer:

Option A

Percent of the population that has skin pigment but also carries the recessive allele is 21\n percent

Explanation:

As per hardy-weinberg equation,

p^2+q^2+2pq = 1\n------------- Eq(A)

where

p^2= \nfrequency of the homozygous genotype (dominant)

q^2= \nfrequency of the homozygous genotype (recessive)

pq= \nfrequency of the heterozygous genotype (recessive)

Also, sum of the allele frequencies at the locus is equal to one.

Thus,  p + q = 1\n ------------- Eq(B)

Here frequency of recessive allele i.e q = 30\n%

Substituting this in equation B, we get

p + 0.3 = 1\np = 1-0.3\np= 0.7\n

frequency of dominant allele i.e q = 70\n%

Substituting the value of frequency of both dominant and recessive allele in equation A, we get

(0.3^2) + (0.7^2) + 2pq = 1\npq = (1-0.3^2-0.7^2)/(2) \npq = (0.42)/(2) \npq = 0.21\n

Thus, percent of the population that has skin pigment but also carries the recessive allele is 21\n percent
The correct answer will be 42%

You cross two red griffins with blue eyes and produce offspring that are: red with blue eyes, red with green eyes, white with blue eyes, and white with green eyes. Assuming that the genes for body color and eye color are on different chromosomes, what is the ratio of these offspring’s phenotype?

Answers

Answer:

The reason for the offspring to present these genotypes is that during the formation of the gametes, the alleles separate and are inherited independently, therefore they can generate several different phenotypic combinations.

Explanation:

In order for an offspring to present very different phenotypes, as shown in the question above, it is necessary that the two red griffins with blue eyes that were crossed are heterozygous. Thus it will be possible for the offspring to present a wide variety of phenotype, according to Mendel's second law.

Mendel's second law is called the Law of segregation. This law explains that the alleles (which determine the characteristics of individuals) are separated in the formation of gametes and inherited by the offspring of a cross independently, and can generate different combinations of phenotypes, when the parents of a cross are heterozygous.

You want to make 50 ml of 1X tricaine solution in order to euthanize some fish. How much of a 20X tricaine stock solution will you need to dilute in order to make your solution?a. 1 ml b. 5 ml c. 0.4 ml d. 10 ml e. 2.5 ml

Answers

Answer: e. 2.5 ml

Explanation:

According to the dilution law,

C_1V_1=C_2V_2

where,

C_1 = concentration of stock solution = 20X

V_1 = volume of stock solution = ?

C_2 = concentration of required solution= 1X

V_2 = volume of  required solution= 50 ml

20* V_1=1* 50ml

V_2=2.5ml

Thus 2.5 ml much of a 20X tricaine stock solution is needed to dilute in order to make your solution.

In the process of embryonic development, which stage comes first?A. Gastrula
B.Blastocyst
C.morula
D.Blastocoel

Answers

Ans.

Embryogenesis or embryonic development is defined as a process that involves formation and development of a zygote into embryo. The fertilized egg or zygote undergoes mitotic divisions through cleavage and divides rapidly.

The first stage of embryonic development is known as morula that represents a 16 cells consisting solid ball-like structure. The morula later develops into blastula.

Thus, the correct answer is option C). 'morula.'
i think b but i could be wrong

Can the brain repair itself

Answers

Answer:

Yes

Explanation:

After a traumatic brain injury, it sometimes happens that the brain can repair itself, building new brain cells to replace damaged ones. But the repair doesn't happen quickly enough to allow recovery from degenerative conditions like motor neuron disease
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