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Tju [1.3M]
3 years ago
13

What makes the sides and the the bridges of the double helix?

Biology
1 answer:
Lerok [7]3 years ago
4 0
The sides of the double helix of the DNA are made up of sugar and phosphate backbone. The sugar is deoxyribose in case of DNA and ribose in case of RNA. The bridges are formed of the nitrogenous bases; adenine, guanine, thymine, and cytosine. RNA contains uracil n place of thymine.
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A biochemist modified a protein so the amino acid lysine occurred where the amino acid aspartic acid previously occurred. this c
Cerrena [4.2K]
<span>A biochemist modified a protein so the amino acid lysine occurred where the amino acid aspartic acid previously occurred. this change could ... </span>alter the protein's tertiary structure. Hope this Helps 
6 0
3 years ago
If a solid contain some particles that amount and 50°C and other particles amount mount at 110°C what must be true about the sol
mina [271]

Answer: The solid is a mixture

Explanation:

Here's the complete question:

If a solid contains some particles that melt at 50°C and other particles that melt at 110°C, what must be true about the solid?

A. The solid is an element.

B. The solid is a mixture.

C. The solid is a pure substance.

D. The solid has three boiling points.

It should be noted that an element consist of an atom but in this scenario, there are different particles that also have different melting points. Therefore, it's not an element, but rather a mixture.

Also, the solid in this case is not a pure substance and doesn't have three boiling points.

Therefore, the correct option is B.

4 0
3 years ago
This really isn't a question but answers to a quiz for my fellow people who are apart of K-12 and this is the quiz for science s
Mama L [17]

Explanation:

1. If an organism is composed of only one cell, it _is unicellular_____

An organism that is composed of only one cell is called a unicellular organism. Organisms with more than one cell is said to be multi-cellular. Examples are yeast, bacteria, paramecium e.t.c

Their single cell can perform all life functions they need to survive and be called a living organism. Such a cell is capable of reproduction, excretion, locomotion, feeding e.t.c

Learn more:

Cells brainly.com/question/12613470

2. Tissues combine to form __Organs____

In the organisation of life, cells combines to form tissues that are capable of performing a specific function. A combination of tissues is known as organs. When organs combine we have a system.

These divisions of life is known as the organization of life. This divides life from the simplest form called the cell to the most complex one called system. Some organisms only exists at the cell level others as tissues and so on.

Learn more:

Organization of life brainly.com/question/13045775

3. How is tendon different from a ligament? ______

A tendon is a band of inelastic tissues that attaches a muscle to a bone. A ligament joints bones to bones.

Tendons and ligaments are tissues that helps movement and to keep organs in in place.

A ligament simply positions bones by connecting them together through a flexible tissue.

A tendon connects bones and muscles to that movement can occur.

Learn more:

Skeletal muscles brainly.com/question/10243621

4. What feature do plants have that provide structure and form?______

Plants have rigid tubes made of cellulose which gives them their shape and form.

These rigid tubes made of cellulose are called cellwalls. They are made up of cellulose. The cell wall gives the plant cell its shape and provides mechanical support for the cell.

The cell wall is an outer covering of the plant cell. Animals do not have cell walls.

They are often called cellulose cellwall.

Learn more:

Cell wall brainly.com/question/2563001

#learnwithBrainly

4 0
3 years ago
Name and define the four parts of blood.
Alex

Answer:

plasma, red blood cells, white blood cells, and platelets.

Explanation:

plasma is the colorless fluid part of blood, lymph, or milk, in which corpuscles or fat globules are suspended. red blood cells have a high concentration of hemoglobin, a protein that binds to oxygen from the lungs and that gives blood its red color. white blood cells are part of the body's immune system. They help the body fight infection and other diseases. platelets are pieces of very large cells in the bone marrow called megakaryocytes. they help form blood clots to slow or stop bleeding and to help wounds heal.

7 0
3 years ago
What evidence supports the claim that the earth has layers?
andrew11 [14]

Answer:

There are many ways scientists can gather evidence to learn about Earth's interior including direct evidence from rock samples and indirect evidence from seismic waves.

also

1. Seismic waves and earthquakes

2. Volcanoes

3. Principles of density

​4. Earth is magnetic

Explanation:

5 0
3 years ago
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