Humans inhale air, and our lungs facilitate the diffusion of oxygen into the blood. Read more by registering at BYJU’S NEET. Explore more... View Article
The actual process of digestion begins in the buccal cavity, where food is mixed with saliva and pushed down into the stomach through the food... View Article
Humans have double circulation. Furthemore, our circulatory system is closed, which means blood flows inside vessels Read more by registering at... View Article
Yes, human DNA is double-stranded. It is called a double helix. The two strands of DNA run antiparallel to each other. The nitrogenous bases of... View Article
The molecular structure of DNA is called a double helix. James Watson and Francis Crick in 1953 proposed the double helix model of DNA based on... View Article
DNA consists of nucleotide monomers. Each nucleotide has a nitrogenous base attached to the deoxyribose sugar with phosphate moiety. The four... View Article
DNA is tightly packed to fit inside the cell. DNA packaging in eukaryotic cells is highly organised and complex. DNA is wrapped around histone... View Article
Linker DNA is around 38 to 53 base pairs long. Linker DNA and the fifth histone molecule connect the two adjacent nucleosomes. Nucleosomes appear... View Article
Most of the genes (>99%) are the same in all the people. Alleles are different variants of the same genes, which cause variation among people.... View Article
Bacteria have non-coding sequences in DNA but they are very less compared to a eukaryotic cell. Only 12% of prokaryotic genome accounts for... View Article
Most of the DNA is found in the nucleus of the cell known as nuclear DNA. A small amount of DNA is found in mitochondria (mtDNA). Plants have DNA... View Article
Polytene chromosomes are giant chromosomes and are commonly found in the salivary glands of insects. Balbiani discovered polytene chromosomes in... View Article
Satellite chromosomes have secondary constrictions. They have one or more secondary constrictions. Primary constriction refers to the region of... View Article
Chromosome 1 has the most genes. There are 2968 genes present on chromosome number 1. Y chromosome has the least number of genes, i.e. 231.... View Article
DNA molecule is unzipped at the time of replication. Replication starts with the unzipping of DNA at the site known as the origin of replication.... View Article
Loss or gain of one or more chromosomes is known as aneuploidy. If a person has one chromosome more than the normal 46 chromosomes then it is... View Article
Yes, DNA can be extracted from a cell. Friedrich Miescher extracted DNA for the first time in 1869 from white blood cells. He named it ‘nuclein’.... View Article
Intelligence is influenced by both environmental factors and genes. Researchers have found involvement of many genes (>500), which influence... View Article
