Karyotyping is used to:
study chromosomes.
treat Down syndrome.
repair chromosomes.
diagnose genetic diseases.
A
Explanation:
it’s the one that makes the most sense !
<span>The question says, 'which component of a virus is lacking in a cell. The answer is capsid. virus capsid are protein shell of a virus, they envelope the virus and protect it from harm. Cells does not have capsid, they have rigid cell wall instead. The rigid cell wall protect the cell from harm and also give the cell shape.</span>
A single molecule is the one that is responsible for initiating a signal transduction pathway. The answer in this question is a single molecule. Molecule is defined as an electrically neutral group of two atoms or more held together by a chemical bonds.
1) Oxygen
2) Carbon
3) Hydrogen (water)
Hope this helps... mark as Brainliest plz
