How many DNA molecules are in A cell?
46 DNA molecules
Explanation: In each somatic cell there are 46 DNA molecules, For the second question how protein synthesis occur, it occurs by transcription and translation. Transcription occurs in the nucleus and translation occurs in the cytoplasm.
What are the molecules of DNA?
DNA is a linear molecule composed of four types of smaller chemical molecules called nucleotide bases: adenine (A), cytosine (C), guanine (G), and thymine (T). The order of these bases is called the DNA sequence.
What is the role of the DNA molecule in cells?
The main role of DNA in the cell is the long-term storage of information. It is often compared to a blueprint, since it contains the instructions to construct other components of the cell, such as proteins and RNA molecules. To read the genetic code, cells make a copy of a stretch of DNA in the nucleic acid RNA.
What does A DNA molecule in A cell contain?
DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
How many molecules are in a single cell?
Ho’s analysis reveals for the first time how many molecules of each protein there are in the cell, with a total number of molecules estimated to be around 42 million.
How many molecules are in a strand of DNA?
DNA is made up of six smaller molecules — a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine).
What is an RNA molecule?
Ribonucleic acid (RNA) is a linear molecule composed of four types of smaller molecules called ribonucleotide bases: adenine (A), cytosine (C), guanine (G), and uracil (U). RNA is synthesized from DNA by an enzyme known as RNA polymerase during a process called transcription.
What are the components of DNA and RNA molecule?
Both DNA and RNA are made from nucleotides, each containing a five-carbon sugar backbone, a phosphate group, and a nitrogen base. DNA provides the code for the cell ‘s activities, while RNA converts that code into proteins to carry out cellular functions.
What are the three functions of the DNA molecule?
The four roles DNA plays are replication, encoding information, mutation/recombination and gene expression.
- Replication. DNA exists in a double-helical arrangement, in which each base along one strand binds to a complementary base on the other strand.
- Encoding Information.
- Mutation and Recombination.
- Gene Expression.
How does the DNA molecule control the appearance and function of a cell?
By controlling the manufacture of structural proteins, DNA is able to influence the physical appearance of a cell. By controlling enzyme production, DNA is able to control all aspects of cellular metabolism and thus control the activity and biological functions of the cell.
Which of the following describes a DNA molecule?
The right answer to the given question is option A) A double helix. It best describes the structure of a DNA molecule. Moreover, the DNA is not a single stranded and it does not comprise amino acids.
What is the shape of the DNA molecule?
double helix
The double helix is a description of the molecular shape of a double-stranded DNA molecule. In 1953, Francis Crick and James Watson first described the molecular structure of DNA, which they called a “double helix,” in the journal Nature.
How does DNA affect the cells?
The major effect in cells is DNA breaks. Since DNA consists of a pair of complementary double strands, breaks of either a single strand or both strands can occur. However, the latter is believed to be much more important biologically.
What does the DNA tell the cell to do?
DNA is in each cell in the organism and tells cells what proteins to make. Mostly, these proteins are enzymes. DNA is inherited by children from their parents. This is why children share traits with their parents, such as skin, hair and eye color. The DNA in a person is a combination of the DNA from each of their parents.
What type of cells is DNA found in?
In eukaryotic cells, most DNA is located in the cell nucleus (though some DNA is also contained in other organelles, such as in the mitochondria and the chloroplast in plants). Nuclear DNA is organized into linear molecules called chromosomes.
What does DNA produce in cells?
DNA (deoxyribonucleic acid) is a double-stranded molecule that stores the genetic instructions your body’s cells need to make proteins . Proteins, on the other hand, are the ‘workhorses’ of the body. Nearly every function in the human body – both normal and disease-related – is carried out by one or many proteins.