What is the smallest chromosome or DNA?
Chromosome 21 is the smallest human chromosome, spanning about 48 million base pairs (the building blocks of DNA) and representing 1.5 to 2 percent of the total DNA in cells.
What is the difference between chromatin and chromosomes quizlet?
Chromatin is the DNA and proteins that make up a chromosome. Chromosomes are the separate pieces of DNA in a cell. And Chromatids are identical pieces of DNA held together by a centromere.
What is the difference between chromosomes and chromatin and chromatid?
Chromosomes are single-stranded groupings of condensed chromatin. … A duplicated chromosome is double-stranded and has the familiar X shape. The two strands are identical and connected at a central region called the centromere. A chromatid is either of the two strands of a replicated chromosome.
Is a chromosome smaller than a cell?
Chromosomes contain nucleic acids and proteins and they carry the genetic information in the form of genes. The nucleus contains chromosomes. … A cell is the smallest functional unit of life and contains nucleus and cytoplasm in a membrane-bound structure.
Which is the smallest gene?
Thus the mccA gene encodes the peptidic chain of MccC7. To our knowledge, mccA is the smallest gene so far reported.
Is DNA large or small?
The DNA inside each of your cells is longer than you are, but packs down into a space smaller than you can see. The DNA in your cells is packaged into 46 chromosomes in the nucleus. As well as being a naturally helical molecule, DNA is supercoiled using enzymes so that it takes up less space.