Answer:
Frameshift mutation is caused by the addition or deletion of a base pair in the DNA of a gene.
Explanation:
Frameshift mutation also known as a framing error or a reading frame shift.
Frameshift mutations are due to either insertions or deletions of nucleotides. This causes the entire DNA strand to elongate or to shrink in size.
There are two types of frameshift mutations.They are insertions and deletions. Insertions involve the insertion of one of more extra nucleotides into a DNA chain.
Several diseases have frameshift mutations like HIV, Crohn's disease, cystic fibrosis etc.
<span>Cells produced by the root and shoot tip meristems become the primary tissues of the plant body. </span>
The elongation of
the root and stem forms the primary
plant body. This primary plan body is composed of primary tissues. The primary
plant body includes the young, soft shoots and
roots of a tree or shrub, or the entire plant body in some
herbaceous plants.
Answer:
Polar molecules are unable to go across unless they are crossed with the help of the protein channel.
Due to the semi-permeable nature of the plasma membrane polar molecules and molecules with high molecular weight are unable to cross the membrane.
Their transportation across the cell membrane is facilitated by integral transmembrane proteins or carrier proteins which form channels across the membrane.
For example, fructose in the small intestine is transported into the cell with the help of GLUT5 transporter.
Answer: Peptide bond
Explanation: A peptide bond is a type covalent bond that joins two amino acid molecules. It is formed by the removal of elements of water from a carboxyl group of one amino acid and an amino group of another amino acid. It is a condensation reaction that results in the formation of dipeptide molecule. Three amino acids can be joined by a peptide bond to form a tripeptide.