The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods
Answer:
The "rib" in ribosome comes from ribonucleic acid (RNA) which provides the instructions for making proteins.
Ribosomes are different from most organelles in that they are not surrounded by a protective membrane.
Ribosome was discovered in 1974 by Albert Claude, Christian de Duve, and George Emil Palade. They won the Nobel Prize for their discovery.
Explanation:
Answer:
Yes.
DNA or deoxyribonucleic acid is a thread like structure that contains Hereditary and Genetic materials such as chromosomes.
Scientists call it the 'Book of life'.
(1) atom
(2) molecule
(3) organelle
(4) cell