Quick Answer: What Is DNA And Gene?

What is DNA short answer?

DNA stands for deoxyribonucleic acid, which is a molecule that contains the instructions an organism needs to develop, live and reproduce.

These instructions are found inside every cell and are passed down from parents to their offspring..

Is DNA bigger than a chromosome?

If we talk about the uncoiled DNA, then DNA is larger than the chromosome. And if we talk about the coiled DNA, then DNA is smaller than the chromosome. When DNA gets coiled, it becomes smaller in size just in order to fit the nucleus of the cell.

What Colour is DNA?

Figure 1: A single nucleotide contains a nitrogenous base (red), a deoxyribose sugar molecule (gray), and a phosphate group attached to the 5′ side of the sugar (indicated by light gray). Opposite to the 5′ side of the sugar molecule is the 3′ side (dark gray), which has a free hydroxyl group attached (not shown).

How do we see DNA?

Given that DNA molecules are found inside the cells, they are too small to be seen with the naked eye. For this reason, a microscope is needed. While it is possible to see the (containing DNA) using a light microscope, DNA strands/threads can only be viewed using microscopes that allow for higher resolution.

What DNA contains?

Your genome? is made of a chemical called deoxyribonucleic acid, or DNA for short. DNA contains four basic building blocks or ‘bases?’: adenine? (A), cytosine? (C), guanine? (G) and thymine? (T). The order, or sequence, of these bases form the instructions in the genome. DNA is a two-stranded molecule.

What are the four basic units of DNA?

There are 4 different bases in DNA: Guanine (G), Adenine (A), Cytosine (C) and Thymine (T). The sequence in which the bases occur is a code that contains information.

What is the difference between gene and DNA?

DNA is the molecule that is the hereditary material in all living cells. Genes are made of DNA, and so is the genome itself. A gene consists of enough DNA to code for one protein, and a genome is simply the sum total of an organism’s DNA.

What does DNA look like in real life?

What does a test tube of DNA look like? A. Deoxyribonucleic acid extracted from cells has been variously described as looking like strands of mucus; limp, thin, white noodles; or a network of delicate, limp fibers. Under a microscope, the familiar double-helix molecule of DNA can be seen.

Is DNA a cell?

In organisms called eukaryotes, DNA is found inside a special area of the cell called the nucleus. Because the cell is very small, and because organisms have many DNA molecules per cell, each DNA molecule must be tightly packaged. … Researchers refer to DNA found in the cell’s nucleus as nuclear DNA.

How much DNA is in a chromosome?

There are 22 homologous pairs and two sex chromosomes (the X and Y chromosomes). One chromosome in each pair is inherited from one’s mother and one from one’s father. Each chromosome is a single molecule of DNA.

How long is your DNA?

about 3 metersAt actual size, a human cell’s DNA totals about 3 meters in length. McGraw-Hill Encyclopedia of Science and Technology . New York, McGraw Hill, 2012. If stretched out, would form very thin thread, about 6 feet (2 meters) long.

Can 2 people have the same DNA?

Your DNA is arranged into chromosomes, which are grouped into 23 pairs. Theoretically, same-sex siblings could be created with the same selection of chromosomes, but the odds of this happening would be one in 246 or about 70 trillion. … In fact, it’s even less likely than that.

What is DNA important?

DNA is pivotal to our growth, reproduction, and health. It contains the instructions necessary for your cells to produce proteins that affect many different processes and functions in your body. Because DNA is so important, damage or mutations can sometimes contribute to the development of disease.

What is the simple definition of DNA?

DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person’s body has the same DNA.

Is DNA in the blood?

DNA is contained in blood, semen, skin cells, tissue, organs, muscle, brain cells, bone, teeth, hair, saliva, mucus, perspiration, fingernails, urine, feces, etc.

What would happen if DNA get damaged?

The DNA in just one of your cells gets damaged tens of thousands of times per day. Because DNA provides the blueprint for the proteins your cells need to function, this damage can cause serious issues—including cancer. Fortunately, your cells have ways of fixing most of these problems, most of the time.

How much DNA is in the human body?

The diploid human genome is thus composed of 46 DNA molecules of 24 distinct types. Because human chromosomes exist in pairs that are almost identical, only 3 billion nucleotide pairs (the haploid genome) need to be sequenced to gain complete information concerning a representative human genome.