Grade 10 - Life Science Exam Paper Questions [2020] mg-educationallife

       Grade 10 - Life Science Exam Paper Questions [2020]

WHAT IS LIFE SCIENCE?

Life science is the scientific study of living things from molecular level to the interaction with one another and the environment.

WHAT ARE ENZYMES?

Enzymes are proteins that act as catalyts [substance that fasten up the rate of chemical reaction without changing itself].

The role of enzyme it regulate and make possible every single chemical reaction in living cells. 

They join molecules together to work bigger molecules and they break large molecules into smaller molecule.

STATE THE THEORY OF CELLS

-All living things are made up of cells
-Cells are the smallest living things 
-All cells arise from pre-existing cells
-Cells contain inherited information for growth,development and specialised functions

NAME 4 PHASES THAT ARE INVOLVED IN THE MITOS PROCESS AND EXPLAIN WHAT HAPPENS IN EACH PHASE?

- Prophase _ Cells have now identical chromatids,nucleus and nuclear membrane disappears

- Metaphase _ Double stranded chromosomes line up in the equator attached to pole by spindle fibres 

- Anaphase _ Chromatids are pulled to opposite pores,each chromatid is now a chromosome.

- Telophase _ nucleus and cytoplasm divides,two identical cells are formed.