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Mrac [35]
3 years ago
12

What are histones, and how are they arranged in nucleosomes? Drag the terms on the left to the appropriate blanks on the right t

o complete the sentences. Not all terms will be used.
a. lysine and arginine
b. histidine
c. five
d. four
e. eight
f. glycine and proline
g. two
h. one
Histones include_______ main classes of relatively small basic proteins containing relatively large amounts of_______ . Nucleosomes are made of________ each of_______ types of histones.
Biology
1 answer:
Eva8 [605]3 years ago
4 0

Answer:

1) c. five

2) a. lysine and arginine

3) g. two

4) d. four

Explanation:

A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).

Basically, nucleotide comprises of the following parts;

1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.

2. A phosphate group.

3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.

The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;

I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.

II. Phosphate: this is the structural backbone that provides support to DNA.

Histones are a group of highly basic proteins that are mainly associated with deoxyribonucleic acid (DNA) in the nucleus of a living organism and then condense it to chromatin.

Histones include five main classes of relatively small basic proteins containing relatively large amounts of lysine and arginine. Nucleosomes are made of two each of four types of histones.

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Nerve cells is the correct answer :)
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What is the order of these objects as it occurs in a microscope, beginning with the eye to the specimen on the stage.
AleksAgata [21]
<h2>Order of parts of a microscope </h2>

First – ocular lens

Second – Body tube

Third – Revolving Nosepiece

Fourth – Objective lens

Fifth – Coverslip

Explanation:

Ocular lens: The lens present in the eyepiece at the top of the microscope, close to the eyes, through which a person looks through the microscope to view the specimen. Magnification of ocular lens in a compound microscope is usually 10x

Body tube: The tube that connects the eyepiece with the objective of the microscope for continuous optical alignment.

Revolving Nosepiece: The turret that holds the objective and revolves to select the objective lens according to its magnification

Objective lens: The objective lens is located above the specimen rack. Objective lens creates the primary image of the specimen viewed through the eyepiece. A single compound microscope can have more than two objective lens and their magnification ranges from 4x, 10x, 40x, 100x power.

Coverslip: The cover glass which covers the objective lens and prevent from touching the specimen . This is the object directly above the specimen.

4 0
3 years ago
How could life on Earth change if both Carbon Dioxide and Ozone levels began to decrease? Describe at least two ways life would
soldier1979 [14.2K]

Answer:

Increase occur in skin diseases and decrease occurs in the Earth's average temperature.

Explanation:

If both Carbon Dioxide and Ozone levels began to decrease, increase occur in skin diseases and decrease occurs in the Earth's average temperature. The decrease in ozone levels allows more UV radiation to reach the Earth's surface which lead to various diseases such as skin cancer, cataracts, and weakened immune systems. The atmospheric carbondioxide gas is responsible for the increase of surface temperature by trapping reflected solar radiations so decrease in carbondioxide concentration will leads to lower surface temperature.

3 0
3 years ago
If you have a vloume of 55l and a density of 2kg/l what is the mass
dolphi86 [110]

Answer:

110 kg

Explanation:

Density = Mass / Volume ===> Mass = Density x Volume

Now follow the given:

- Density = 2 kg/L or 2000 g/L

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Mass = 55 L x 2 kg/L = 110 kg or 110000 g. ( Liters is cancelled by Liters).

8 0
3 years ago
 glucose solution of density 1050 kg/m3 is transferred from a collapsible bag through a tube and syringe into the vein of a pers
34kurt

Answer:

0.136 meter

Explanation:

The following equation will be used to solve this question -

P_{atm} + \frac{1}{2} (rho)v^2 + (rho)gh = P_{inject} + \frac{1}{2}(rho)v_{inject}^2 + (rho)gh_{injec}

P_{atm} -P_{injec} = 1400\frac{N}{m^{2} }

Velocity is zero.

Removing out the nullified terms from the above equation, we get -

(rho)gh = P_{injec}\\1050 * 9.8 * h = 1400\\h = \frac{1400}{1050*9.8} \\h = 0.136 meter

Hence,  top of the liquid in the bottle must be at a height of 0.136 meter.

8 0
3 years ago
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