OBJECTIVES
abidaMultiple Choice Questions MCQs Four options are given at the end of each statement. You should encircle one option from them. Which of the following compound is'absent in plasma membrane?…
MODEL SUBJECTIVE QUESTION
Describe the fluid mosaic model of cell membrane. Describe different movements across the cell membrane. Write note on ribosomes. Write note on endoplasmic reticulum. Describe structure and function of Golgi…
ORGANS AND ORGAN SYSTEM
Organ The group of different tissues performing same function is called organs. Different tissues are organized into the organs except simplest animals (sponges and cnidarians). Some organs have their tissue…
Connective Tissues
The tissue with loose arrangement of cells and the cells are scattered in an extracellular matrix are called connective tissue This non living matrix consists of a web of fibers.…
TISSUES
The group of similar cells which performs same functions is called tissue. There are four types of tissues: epithelial tissues, connective tissues, muscles tissues and nerve tissues. Epithelial tissues The…
NUCLEUS
Nucleus contains most of the genes that control the cell. It is the most conspicuous organelle in the eukaryotic cell. Its average diameter is about 5. It performs two major…
VACOULES AND VESICLES
Vacuoles and vesicles are membrane-enclosed sacs within the cell. But vacuoles are larger than vesicles. Vacuoles have various functions. They form food by phagocytosis. Many freshwater protists have contractile vacuoles…
CENTRIOLES AND MICROTUBULE ORGANIZING CENTERS
Microtubule-organizing centers The specialized non membranous regions of cytoplasm near the nucleus are the microtubule-organizing centers. These centers contain dense material. This material gives rise to a large number of…
THE CYTOSKELETON
The cytoskeleton is a network of fibers suspended through the cytoplasm. There are three fibers in the cytoskeleton. These are microtubuies, microfilaments and intermediate filaments. Functions of Cytoskeleton - The…
MITOCHONDRIA
Mitochondria are commonly called as power house of the cell. They provide energy transuding system. This system is used to change the food into chemical energy by oxidative phosphorylation ATP…