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3 years ago

30 POINTS

1 answer:

8 0

Anemia is a condition where there is deficiency in healthy red blood cells or hemoglobin resulting in pallor or weakness. It results in low level of hemoglobin which is the protein that transports oxygen around the body. Lack of oxygen in the body will result to weakness, shortness of breath and dizziness. Nikoleta's symptoms of malaise, lethargy and being tired is usually caused by too much work of the heart. In anemic patient, the heart has to pump faster than normal because it has to supply red blood cells around the body. Since the heart is working double-time, it usually results to being tired, lethargic and malaise of the person with anemia. Nikoleta's pale skin is attributed also on the fact that she has low supply of red blood cells around the body. If Nikoleta is lethargic and always tired, little things may irritate her immediately, hence, her being cranky

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Why are lipids able to function as protective barriers in cells?

Papessa [141]

<span>The reason behind the lipids which are able to function as protective barriers in cells is that lipids do not dissolve in water.
If lipids dissolve in water, they will not be able to function as protective barriers in cells. N</span><span>ucleic acids, proteins, lipids and carbohydrates are the four types of macro-molecules in the cell.</span>

4 0

3 years ago

After three years of heavy rain, a field of soybeans shows a decreased yield. They have weaker root systems compared to plants i

Troyanec [42]

Answer:

It can be hypothesized that fungal pathogen is responsible for decreased yield.

Explanation:

As the extensive heavy rain changed the climate of that area the soybean plant was effected by pathogenic fungus grown in the field. As we know that fungi makes spores that can withstand harsh environment. Humid and moist environment is favorable for fungi growth. So when spores find a suitable environment they grow rapidly. In the given example, the fungi was pathogenic that produced toxic compounds and effected the growth of soybean plant by damaging its root system and water supply to plant.

5 0

3 years ago

If the female fly has EE and the male fly has EE, what are the possible percentages of phenotypes and genotypes of their offspri

algol [13]

Answer:

100% EE, 100% red eyes

Explanation:

For an organism, the genotype refers to the genetic characteristics of the organism while the phenotype refers to the physical characteristics of the organism.

The red eyes (E) is dominant while the white eyes (e) is recessive.

Since both parents are EE, the genotype of their offsprings would be EE, EE, EE, EE

That is: EE × EE = EE, EE, EE, EE

Hence the genotype is 100% EE.

Also, the phenotype is 100 red eyes.

4 0

3 years ago

The four nucleotides found in human DNA (G, A, T, C) combine in groups of three to create potentially 64 different amino acids,

Liula [17]

Question 1

Answer:

D- Different nucleotide combinations code for the same amino acid.

Explanation:

Some amino acid has more than one nucleotide combination coding for it.

Question 2

Answer:

B- Redundancy

Explanation:

Redundancy means that more than one codon is assigned for the coding of most amino acids.

Question 3

Answer:

Explanation:

Since both parents are homozygous dominant and recessive respectively, no crossing can give the homozygous dominant as all offspring are heterozygous.

Question 4

Answer:

Homozygous.

Explanation:

The genotype 'dd' is homozygous since the two letters are both in the lower case.

Question 5

Answer:

25%

Question 6

Answer:

Dihybrid cross

3 0

3 years ago

What are ejcs? Describe the importance of the ejc complexes for the export and stability of mrnas.

Alex Ar [27]

Explanation:

The Exon Junction Complex (EJC) is a eukaryotic molecular machine that interacts with spliced mRNA upstream of exon-exon junctions, providing a binding platform for other trans-acting proteins that determine the fate of the mRNA. The spliceosome deposits the ~335kD EJC in a non-sequence specific manner 20-24 nucleotides upstream of an exon-junction. Functionally, the EJC aids in nuclear export of spliced mRNAs, assists in nonsense-mediated decay of incorrectly spliced mRNAs containing premature stop codons, and enhances translation efficiency.

Pre-mRNA bound by a spliceosome is usually not exported from the nucleus, so as to make sure that only fully-processed mRNA travels to the cytoplasm to be translated. A protein called the mRNP exporter binds to the EJC, both through RNA interactions and interactions with the EJC-associated protein REF (RNA export factor) to help pre-mRNA exit the nuclear pore complex.

Interestingly, the efficiency of unspliced mRNA export is dependent on the length; longer mRNAs are exported more efficiently than shorter mRNAs. In spliced mRNAs, however, once the 5' exon is long enough to bind the EJC, the length of the spliced mRNA does not affect the export efficiency.

There are a certain number of EJCs in a cell, and they must be recycled in order to continue tagging mature mRNAs. Once in the cytoplasm, the ribosome-associated regulator protein (PYM) acts as a dissociation factor.

5 0

3 years ago