Day: April 30, 2018
THE CELL AND CELL THEORY
Landmarks in the study of a cell Soon after Anton Van Leeuwenhoek invented the microscope, Robert Hooke in 1665 observed a piece of cork under the microscope and found it to be made of small compartments which he called “cells” (Latin cell = small room). In 1672, Leeuwenhoek observed bacteria, sperms and red blood corpuscles,…
COMPONENTS OF THE CELL
The major components of the cell are cell membrane cytoplasm nucleus Cell membrane (Plasma membrane) Each cell has a limiting boundary, the cell membrane, plasma membrane or plasmalemma. It is a living membrane, outermost in animal cells but internal to cell wall in plant cells. It is flexible and can fold in (as in food vacuoles…
CELLULAR RESPIRATION
Cellular respiration is a fundamental biochemical process that occurs in all living cells, from the tiniest bacteria to the most complex multicellular organisms. It is the means by which cells convert organic molecules, primarily glucose, into adenosine triphosphate (ATP) – the universal currency of cellular energy. This intricate and highly regulated metabolic pathway is essential…