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3 years ago

Explain whether nuclear or mitochondrial DNA is better for identifying a specific person

Chemistry

1 answer:

hodyreva [135]3 years ago

7 0

Answer:-

Nuclear DNA is inherited from all ancestors. But mitochondrial DNA is inherited from a single lineage. The DNA inside of mitochondria (called mtDNA) unlike DNA inside the nucleus, comes from only mothers.

It is not a mixture of our parent’s DNA, and each person’s mtDNA is nearly identical to his or her mother’s mtDNA.

Thus only nDNA being more unique is more useful for identifying in forensics. In cases where nDNA is not sufficient, mtDNA is used.

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Gold is a very soft metal that can be hammered into extremely thin sheets known as gold leaf. If a 1.78 g piece of gold is hamme

Solnce55 [7]

Answer:

$2.0489\times 10^{-6} cm$ is the average thickness of the sheet.

Explanation:

Mass of gold ,m= 1.78 g

Volume of the gold = V

Density of the gold = D = $19.32g/cm^3$

$D=\frac{m}{V}=19.32g/cm^3=\frac{1.78 g}{V}$

$V = 0.09213 cm^3$

Area of the hammered gold sheet,A = $48.4 ft^2=44,965.052 cm^2$

Thickness of the hammered gold = h

( $1 ft^2=929.03 cm^2$ )

Volume = Area × thickness

$V= A\times h$

$0.09213 cm^3=44,965.052 cm^2\times h$

$h=2.0489\times 10^{-6} cm$

$2.0489\times 10^{-6} cm$ is the average thickness of the sheet.

3 0

4 years ago

For the gas phase decomposition of 1-bromopropane, CH3CH2CH2BrCH3CH=CH2 + HBr the rate constant at 622 K is 6.43×10-4 /s and the

ladessa [460]

Answer is: activation energy of this reaction is 212,01975 kJ/mol.
Arrhenius equation: ln(k₁/k₂) = Ea/R (1/T₂ - 1/T₁).
k₁ = 0,000643 1/s.
k₂ = 0,00828 1/s.

T₁ = 622 K.

T₂ = 666 K.

R = 8,3145 J/Kmol.

1/T₁ = 1/622 K = 0,0016 1/K.
1/T₂ = 1/666 K = 0,0015 1/K.
ln(0,000643/0,00828) = Ea/8,3145 J/Kmol · (-0,0001 1/K).
-2,55 = Ea/8,3145 J/Kmol · (-0,0001 1/K).
Ea = 212019,75 J/mol = 212,01975 kJ/mol.

4 0

3 years ago

Please help with all 4, i don’t understand it

anyanavicka [17]

Answer:

1. the distance of the object is staying the same over time

2. the distance of the object is increasing over time

3. the distance of the object is increasing rapidly

4. the object started gaining distance slowly then began to rapidly increase in distance over time

6 0

3 years ago

In a study of the formation of HI from its elements, H₂(g) + I₂(g) → 2HI(g)equal amounts of H₂ and I₂ were placed in a container

Furkat [3]

Without H2 or I2, the process starts with only HI. In this instance, equilibrium is once more attained as the concentrations of H2 and I2 grow while the concentration of HI steadily falls. Compared to H2 and I2 concentrations, HI is present at equilibrium in much larger amounts. This holds true regardless of whether the reaction started with all reactants or all products. The equilibrium position is a characteristic of the specific reversible reaction and is independent of the process through which equilibrium was reached.

<h3>What is equilibrium?</h3>

Chemical equilibrium refers to the situation in which the reactants and products are present in concentrations that are stable throughout time and do not change the system's properties in any way that can be seen. When both the forward and backward reactions are moving forward at the same speed, this condition is produced. The forward and backward reaction speeds are typically not zero, but they are equal. As a result, there are no discernible variations in the reactant and product concentrations. Dynamic equilibrium describes such a situation.

To learn more about equilibrium visit:

brainly.com/question/14926771

#SPJ4

3 0

2 years ago

What are the properties of matter?

nasty-shy [4]

The Properties of Matter. The general properties of matter result from its relationship with mass and space. Because of its mass, all matter hasinertia (the mass being the measure of its inertia) and weight, if it is in a gravitational field (see gravitation).

7 0

3 years ago