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Studentka2010 [4]
3 years ago
8

it is difficult to evaluate the toxicity of substances what factors can vary how harmful a chemical is dose of exposure age and

genetic makeup will affect response to a toxin.
Chemistry
1 answer:
liq [111]3 years ago
6 0

Answer:

The explanation is given below

Explanation:

Toxicity is a measure of how harmful a substance is on a living organism (causing illness, injury or even death). There are several factors that must be considered when evaluating toxicity:

- Dose of exposure: the amount of substance to which the organism has been exposed to;

- Frequency of exposure: how many times (and for how long) the individual has been exposed to the substance;

- Age and health condition of the individual exposed;

- Genetic makeup: the genetic backgroun of an organism will determine its response and degree of sensitivity to a given substance.

Moreover, there are five main characteristics of substances that determine its toxicity: Solubility (hidrophilic or lipophilic substances), persistence (for how long the substance remains the same and cause the same damage), bioaccumulation (when the substance is progresivelly incorporated in tissues), biomagnification (when the amount of substance rise along trophic levels) and other chemical interactions (different interactions with other chemicals can increase the degree of damage) .  

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Part B
sashaice [31]

The anticodons corresponding to the codons on the mRNA (from part A) is 5' CGA - AAA - GUU 3'.

<h3>What are anticodons?</h3>

Anticodons are nucleotide sequences on tRNA molecules that are complementary to the codons found on mRNA molecules.

The anticodons on tRNA molecules determine the amino acid that is carried by the tRNA.

Just like codons, anticodons occur in triplets of nucleotide sequences.

Considering the codons on the mRNA molecule:

3’ GCT | TTT | CAA | AAA ’5

The complementary anticodon will be:

5' CGA - AAA - GUU 3'

Learn more about anticodons at:brainly.com/question/28067314

#SPJ1

7 0
1 year ago
How many fluorine atoms are in 750.0 mL of a 0.500M HF solution?
SIZIF [17.4K]

Answer:

2.26 \times 10^{23}atomsF

Explanation:

Step 1: Given data

  • Molarity of the HF solution (M): 0.500 M
  • Volume of the solution (V): 750.0 mL

Step 2: Convert "V" to liters

We will use the conversion factor 1 L = 1000 mL.

750.0 mL × 1 L/1000 mL = 0.7500 L

Step 3: Calculate the moles of HF

We will use the following expression.

n = M × V

n = 0.500 mol/L × 0.7500 L = 0.375 mol

Step 4: Calculate the atoms of F in 0.375 moles of HF

We will use the following relationships:

  • 1 mole of HF contains 1 mole of atoms of F.
  • 1 mole of atoms of F contains 6.02 × 10²³ atoms of F (Avogadro's number).

0.375 mol HF \times \frac{1 mol F}{1 molHF} \times \frac{6.02 \times 10^{23}atomsF }{1 mol F} = 2.26 \times 10^{23}atomsF

7 0
3 years ago
Which of the following accurately describes carbon atoms?
katrin2010 [14]
Hello there! 

The answer is A. Carbon atoms can bond to other carbon atoms. In fact, carbon has four electrons to form four bonds with other atoms, including carbon. Carbon is the most common and used element in the world because it makes up all living things. All four main macromolecules also contain carbon.

Hope I helped! ^ω^

7 0
3 years ago
At which temperature and pressure would a sample of helium behave most like an ideal gas?
musickatia [10]

Here we have to get the temperature and pressure at which helium gas mostly behaves as ideal gas.

Helium (He) behave most like an ideal gas upto 24K temperature and 0 atm pressure.

The deviation of a real gas to ideal gas occurs at high temperature and low pressure.

The deviation of ideal gas to real gas occurs on taking into account the van der waals' force of attraction between the gas molecules. Now, the van der waals' interaction depends upon the polarisibility of the gas molecule.

As helium (He) is non-polarisable and very small (atomic number 2) it mostly behaves as ideal gas upto 24K temperature and 0 atm pressure.

Although the deviation from the ideal gas behavior to real gas is not so prominent at little high temperature also. Upto 50K it mostly behaves like an ideal gas.    

6 0
3 years ago
19. What is the most significant factor that controls the development of soil?
Nady [450]
<span>The most significant factor that controls the development of soil is B. climate. Depending on what the climate and the weather are like in a particular area, the soil will be either developed and healthy and fertile, or it won't if the conditions are too harsh. If the weather is nice, usually the soil will form which will be suitable for crops and agriculture, but if it's too hot or too cold, the soil won't be used for such things as it won't be fertile.</span>
8 0
3 years ago
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