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Svetlanka [38]
3 years ago
13

What is the mass of an element with 15 protons, 13 electrons, and 11 neutrons?

Biology
1 answer:
RSB [31]3 years ago
8 0

Answer:

B. 26amu

Explanation:

The nucleus of an atom in an element contains protons, electrons and neutrons. The proton number equals the electron number in a neutral atom. The proton number is also called the atomic number, denoted by Z.

The mass number also called Atomic mass unit (amu) in this case, of an element is the sum of the proton number and the neutron number in the atom of that element. The mass number is denoted by A.

Hence, A = Z + N

Where A = Mass number

Z = Proton (atomic number)

N = Neutron number

In this question, N is 11 while Z is 15

Hence, the mass number of the element in the question, in AMU, is 15 + 11 = 26amu.

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Human blood type is determined by three alleles IA, IB, and IO. The alleles IA and IB are co-dominant to each other, and both ar
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Explanation:

According to p²+q²+2pq=1 (Hardy-Weinberg equilibrium)

heterozygote allele will be always 2pq

<u>1. Population</u>

1. A blood group has two genotypes- IAIA and IAIO

The genotype frequency will be-

IAIA= 0.3 X 0.3 = 0.9

IAIO= (0.3 x 0.6) x 2= 0.36

Total genotype frequency = 0.9+ 0.36 =0.45 or 45%

Now 45% of 540,000= 2,43000 (A blood group)

2. B blood group has two genotypes- IAIB and IBIO

The genotype frequency will be-

IBIB= 0.1 x 0.1 = 0.1

IBIO= (0.1 x 0.6)-=0.12

Total genotype frequncy= 0.13 or 13%

popluation with B blood group=  13% of 540,000 will be 70,200

3. AB blood group is IAIB

2 x IAIB= (0.3 x 0.1) x 2= 0.6

popluation with B blood group= 6% of 540,000= 32,400

4. O blood group

2. Heterozygote

IBIO blood group

= (0.1 x 0.6) x 2  

= 0.12 or 12%

= 12%

4 0
3 years ago
The Golgi apparatus:
kvasek [131]

Answer:

<h2>D </h2>

Explanation:

1.  The Golgi apparatus is also called as Golgi complex or Golgi bodies.

2.  Golgi apparatus works as the cell's post office.

3. Functions of  Golgi apparatus:  it plays major function is the modifying, sorting and packaging of proteins for secretion, as proteins transport from ER to Golgi complex and in Golgi they further go modification.

- It is also functions in the transport of lipids around the cell.

7 0
2 years ago
How many new viruses can get created from one cell?
Whitepunk [10]

Answer:mutation

Explanation:

As it reproduces it can mutate and cause a new virus

6 0
3 years ago
You are given two fat-like solid substances and upon analysis you determine that Sample A has a higher melting point than sample
cricket20 [7]

Answer:

c) has a lower number of carbon-carbon double bonds than sample B.

Explanation:

The two fat samples were compared on the basis of their melting point. Fats with no carbon-carbon double bonds in their hydrocarbon chains are called saturated ones. These fat molecules are packed tightly and have a higher melting point. On the other hand, the fats with one or more double bonds between carbon atoms are said to be unsaturated ones. These unsaturated fats have a lower melting point as the kink produced by double bonds does not allow their tight packing. Therefore, sample A with a higher melting point should have a less number of C-C double bonds than sample B.

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3 years ago
Crude protein can be directly determined in a feedstuffs <br> a. true <br> b. false
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I hope my answer will help
b.false
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