Answer:
Please find the definition of viscosity, effect of heat on DNA explanation to this question below
Explanation:
Viscosity is a term used to describe FLUIDS, which includes liquids and gases. Viscosity refers to the ability of a gas or liquid to resist flow. In other words, it is the measure of the internal friction that exists between the molecules of a fluid, which resists its flow.
DNA in its natural state exists in a liquid solution, hence, when HEAT is applied, the heat causes ITS MOLECULES to MOVE RELATIVELY FAST and as a result the molecules lose the friction between them and begin to flow. Based on this, heat is said to make DNA LESS VISCOUS i.e. to flow more rapidly.
Viscosity refers to the 'thickness' or 'stickiness' of a fluid. Heat decreases the viscosity of DNA by providing energy to the molecules, which reduces the 'stickiness' between them. The underlying cause is changes in the interactions between the DNA molecules due to the heat energy overcoming the forces holding them together.
Viscosity is a property of a fluid that resists the force tending to cause the fluid to flow. In simple terms, it is the 'thickness' or 'stickiness' of a fluid. The greater the viscosity, the slower the fluid flows.
When exposed to heat, the viscosity of DNA decreases - it 'thins' and flows more easily. This happens because heat provides energy to the DNA molecules, increasing their movement and reducing the 'stickiness' between them.
The underlying cause of the change in viscosity due to heat is actually due to a change in the interactions between the DNA molecules. The added heat energy overcomes the forces holding the molecules close together, allowing them to move more freely relative to each other, thus decreasing the viscosity.
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ALL that apply.
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A)
Meiosis produces genetically diverse cells.
B)
Meiosis increases genetic variation in the offspring.
C)
Meiosis produces haploid cells from a diploid parent cell
D)
Meiosis increases the genetic content in the daughter cells.
E)
Meiosis maintains the number of chromosomes originally present in the
parent cell.
The accurate statements are: Meiosis produces genetically diverse cells, Meiosis increases genetic variation in the offspring, and Meiosis produces haploid cells from diploid parent cell. The inaccurate statements are: Meiosis increases genetic content in daughter cells, and Meiosis maintains original number of chromosomes in parent cell.
The following statements accurately describe the outcome of meiosis:
These statements inaccurately describe meiosis:
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Answer:
A) Meiosis produces genetically diverse cells.
B) Meiosis increases genetic variation in the offspring.
C) Meiosis produces haploid cells from a diploid parent cell
Explanation:
Through crossing over, meiosis produces genetically diverse cells causing more genetic variation of offspring. The Daughter cells in meiosis are formed from a diploid cell that has all 46 chromosomes, however the daughter cells are haploids as they need to join with the other gamete to have a full set of chromosomes.
Answer:
The post-transcriptional modifications in the mRNA produced as a result of the transcription in eukaryotes provide many advantages to the mRNA.
The two post-transcriptional modifications are the addition of 7-methylguanosine cap at 5' end of mRNA called capping whereas the addition of the poly(Adenyl) tail at 3' end called tailing.
The advantages of capping are:
1. Protection of nascent mRNA from the degradation.
2. Recognition by transcription factors helps in translation.
The advantages of tailing are:
1. Protection of the mRNA from enzymatic degradation in the cytosol.
2. Transcription termination
3. Export of the mRNA from the nucleus
Answer:
Graves´ disease is an autoinmmune disease that is caused when the immune system attacks the cells of the thyroid gland, which leads to an overproduction of the hormones secreted by the thyroid gland. This constant attack and destruction on the part of the immune cells causes the thyroid to increase in size, a condition that is commonly known as hyperthyroidism.
Hyperthyroidism can become a really serious issue because the excessive production of the hormones of the thyroid gland will increase the metabolic activity of all parts of the body and can, if left untreated, cause such serious conditions as blood clotting problems, type 1 diabetes, among others.
b. hemoglobin
c. fibrinogen
d. immunoglobulin
e. porphyrin
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.
b. Pons
c. Medulla oblongata
d. A and b
e. B and c
The medulla oblongata and the pons are involved in the regulation of the ventilatory pattern of respiration. So the answer is E.