# What is the 3D structure of DNA?

Chromosomes are made of two DNA polymers that stick together via non-covalent hydrogen bonds. Chromosomal DNA consists of two DNA polymers that make up a 3-dimensional (3D) structure called a double helix.

Table of Contents

## What is the 3D structure of DNA?

Chromosomes are made of two DNA polymers that stick together via non-covalent hydrogen bonds. Chromosomal DNA consists of two DNA polymers that make up a 3-dimensional (3D) structure called a double helix.

## What are the three-dimensional structure of DNA and RNA?

The main difference between the three-dimensional structures of DNA and RNA is that in RNA the three-dimensional structure is single-stranded. The base- pairing that occurs in RNA is all through regions of self-complementarity.

**What is the 3 base unit of DNA?**

nucleotides

It is made up of nucleotides, which has three components. They are nitrogenous bases, deoxyribose sugar and phosphate. DNA contains four nitrogenous bases adenine, guanine, thymine and cytosine.

**Who discovered the 3 dimensional structure of DNA?**

James D. Watson and Francis Crick

The three dimensional structure of the complete DNA molecule was officially discovered by James D. Watson and Francis Crick in 1953.

### How many DNA bases are there?

four nucleotides

There are four nucleotides, or bases, in DNA: adenine (A), cytosine (C), guanine (G), and thymine (T). These bases form specific pairs (A with T, and G with C).

### What is the three-dimensional structure of the double helix?

The structure is called a double helix. DNA is essentially made of sugar, phosphate and bases, bonded together by hydrogen. Most, but not all, known life forms on earth carry these strands of DNA within their cells.

**How many strands make up DNA?**

two

DNA is made of two linked strands that wind around each other to resemble a twisted ladder — a shape known as a double helix. Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases: adenine (A), cytosine (C), guanine (G) or thymine (T).

**Are there more than 4 bases?**

Yet in recent history, scientists have expanded that list from four to six. Now, researchers have discovered the seventh and eighth bases of DNA. For decades, scientists have known that DNA consists of four basic units — adenine, guanine, thymine and cytosine.

#### How to measure surface area of a 3D shape?

Surface Area: The surface area can be measured for 3D shapes or solids. The term surface area is defined as the total area of the surface of the given solid object. Since the faces of the three-dimensional objects are basically 2D shapes, we should add the areas of the surfaces to get the surface area of the object.

#### What are the two distinct measures used for defining the 3D shapes?

The two distinct measures used for defining the 3D shapes are: Surface Area is defined as the total area of the surface of the three-dimensional object. It is denoted as “SA”. The surface area is measured in terms of square units.

**What is the surface area of a three-dimensional object?**

The area of the whole of anything, whether it’s an object or a surface, is the sum of the area of its constituent parts. We now know that the surface area of a three-dimensional object is the total area of all of its surfaces. In this section, we will learn about the various formulas used to calculate the surface area of different objects.

**What is the difference between surface area and total surface area?**

Then, space occupied by a sphere, cuboid, cube, cylinder, cone, hemisphere etc. is known as Surface area but the space occupied by the circle, rectangle, square, triangle etc, is known as Area. Area is measured in Square units. Total surface area is the area of all the surfaces of an object including its base (s).