Crossing over
rubab The exchange of segments between non-sister chromatids of homologous chromosomes during meiosis is called crossing over. Linked genes can be separated by crossing over. Two genes with closer gene loci…
GENE LINKAGE
The genes located on the same chromosome are called linked genes. The phenomenon of staying together of all the genes of a chromosome is called linkage. Every organism possesses numerous…
GLYCOLySIS
abida Glycolysis is the initial step of catabolic chemical reactions. It occurs almost in all the cells. Six-carbon glucose molecule is broken down into two molecules pyruvate during glycolysis. Pyruvate is…
OBJECTIVES & FILL IN THE BLANKS OF CELL: Plasma membran & Cytoplasm
Multiple Choice Questions (MCQs) Amount of protein in cell membrane is: (a) 10% (b) 30% (c) 60% (d) 20% Amount of lipids in cell membrane is: (a) 10% (b) 30%…
HOW CELLS HARVEST ENERGY STORED IN NUTRIENTS
RESPIRATION Animals require a constant supply of energy. This energy performs biological work. The ATP provides this energy. All animals can generate ATP by breaking down organic nutrients. These nutrients…
MECHANISM OF PHOTOSYNTHESIS LIGHT DEPENDENT OR LIGHT REACTION
sana PHOTO-SYSTEMS Photosynthetic pigments are organized into clusters called photo-systems. These photo-systems absorb and utilize the solar energy efficiently in the thylakoid membranes. Each photo-system is composed of two parts. I.…
SUBJECTIVE & SHORT QUESTIONS OF CELL: Plasma membran & Cytoplasm
Describe different structures of plasma membrane. Describe fluid mosaic membrane. Describe different movements across plasma membrane. Describe physio-chemical nature of cytoplasm. SHORT QUESTIONS Give chemical composition of plasma membrane. Ans:…
Multiple Choice Questions MCQs OF ENERGY AND ENZYME
Four options are given at the end of each statement. You should encircle one option from them. The chief source of energy is:a) Potential (b) solar (c) Chemical (d) Kinetic…
Absorption VS Action spectra
Light is electromagnetic energy. Electrochemical energy travels in the form of waves. The distance between the crest of the electromagnetic waves is called wavelength. The entire range of radiations is…
DEFINITIONS AND KEY POINTS of CELL: Plasma membran & Cytoplasm
TERMS DEFINITIONS Homeostasis The maintenance of a constant internal environment despite fluctuations in the external environment is called homoeo stasis. Diffusion The movement of molecules from the area of higher…