5' phosphate 5' end 3' end 3' hydroxyl OH- Base pairs Sugar A: Sugar Sugar Sugar DNA Sugar Sugar Nucleotide T:A Sugar Sugar Sugar P Sugar Hydrogen bonds HO 3' hydroxyl 3' end 5' end 5' phosphate FIGURE 7.2 The Structure of DNA The two strands in the double helix are complementary. Three hydrogen bonds form between a G-C base pair and two between an A-T base pair. The strands are antiparallel; one is oriented in the 5' to 3' direction, and its complement is oriented in the 3' to 5' direction.

Q: What is the structural make-up of a DNA unit.

A: The biochemical substance that is passed on from the preceding generation to the succeeding…

Q: If a double stranded DNA has 30 percent of cytosine, calculate the percentage of adenine in DNA

A: Introduction: DNA, or deoxyribonucleic acid, is the hereditary material in humans and nearly all…

Q: If the nucleotide sequence of one strand of DNA is 5′ ACGTTGCA 3′, what is the sequence of the…

A: In molecular biology, the DNA is made of two complementary strands which runs antiparallel to each…

Q: What are moderately repeated DNA?

A: Repetitive DNA sequences are DNA sequences that occur repeatedly in the genome. Highly repetitive…

Q: In the diagram of DNA at the right: a) fill in the letters representing the bases on the right-hand…

A: Introduction :  The genetic material in most organisms is DNA or Deoxyribonucleic acid. The…

Q: Why is complimentary base pairing vital to the structure of DNA?

A: Answer of the question given below...

Q: Why is DNA present in a double stranded form and not single stranded in organisms?

A: As we know DNA is the basic unit of inheritance and it resides in a well-protected nucleus. DNA is…

Q: Give 2 examples of abiotic factors and 2 examples of biotic factors

A: Abiotic factors are the non-living physical entities that are present in an ecosystem, while the…

Q: If a double stranded DNA has 30 percent of cytosine, calculate the percentage of adenine in DNA

A: Introduction  DNA is an organic molecule that holds instructions for synthesising proteins as well…

Q: Do any strands of nucleic acid exist in nature in which part of the strand is DNA and another part…

A: DNA RNA hybrid is a formed when one strand is DNA and another strand is RNA. In DNA Thymine is…

Q: When proteins recognize and bind to a specific sequence in DNA, why do they usually just recognize…

A: DNA binding proteins are proteins that bind to single or double stranded DNA generally in the major…

Q: How do we know that the structure of DNA is in the form of a right-handed double-helical molecule?

A: Nucleic acid is present in all living beings. It has two versions in the body of an organism. When…

Q: The telomeres of a linear chromosome are made of identical directly repeated DNA sequences. How does…

A: Telomeres:These are the special DNA caps in the eukaryotic chromosomes that prevent the loss of…

Q: The DNA molecules in eukaryotes including humans are negatively supercoiled while that in…

A: Genetics is a part of science worried about the investigation of qualities, hereditary variety, and…

Q: List three important structural motifs in DNA-binding proteins

A: Transcription is the process in which the production of mRNA from one of the strands of DNA, with…

Q: What are the four major heterocyclic bases in DNA?

A: The DNA is a double-helical structure molecule present in the nucleus of all eukaryotic organisms…

Q: What would be the most obvious characteristic of the base distribution of a single-stranded DNA…

A: DNA of a virus has a genome made of deoxyribonucleic acid (DNA) that is replicated by a DNA…

Q: If a double-stranded DNA molecule is 15% thymine, what are the percentages of all the other bases?

A: The deoxyribonucleic acid is the genetic material that is passed from one generation to another…

Q: Although human DNA has a total length of 2 m, it is packaged into a nucleus that is 5 µm in…

A: Cells wrap their DNA strands around scaffolding proteins to form chromatin, a coiled compact…

Q: What are the four nitrogenous bases and which bases pair with one another in a double-stranded…

A: DNA is a double helical structure that contains genes. Genes are the functional unit of heredity in…

Q: If one side of DNA molecule had a base sequence of…

A: DNA or deoxyribonucleic acid, the major genetic material, is a polynucleotide chain made of…

Q: If the DNA of one human cell is stretched out, it would be almost 6 feet long and contain over three…

A: DNA  DNA is the hereditary unit of an organism which transfer from parents to their offsprings. It…

Q: How many combinations of DNA bases are for a polynucleotide of 7 base pairs in length?

A: DNA  The genetic material or genome of an organism. Most of the organism have DNA as genetic…

Q: According to the Watson- Crick model how many polynucleotide chains does a DNA molecule have?

A: The Watson-Crick Model of DNA is a double-stranded, helical molecule. It consists of two…

Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.