By ECZ Study Tool, September 27, 2023
A cell is the basic building block of all living organisms. It is the smallest unit of life that can perform all the necessary functions for an organism to survive and grow. Cells are like tiny factories, carrying out processes such as energy production, growth and reproduction.
Cells come in various shapes and
sizes, but they all have common structures and functions. The outer boundary of
a cell is called the cell membrane which acts like a protective barrier,
allowing some substances to enter and exit the cell.
Inside a cell, you will find
various structures, including the nucleus, which contains genetic information
in the form of DNA. The nucleus serves as the control center that directs the
cell's activities.
Cells also contain tiny structures
called organelles, each with specific jobs. For example in a mitochondria is a
powerhouses of the cell which produces energy while the endoplasmic reticulum
helps with protein synthesis. Cells work together to form tissues, organs and
ultimately entire organisms.
Understanding cells is essential in
biology because they are the foundation of life. By studying cells, scientists
can gain insights into how living organisms function, develop, and adapt to
their environments
When preparing for your ECZ exams, one of the most powerful tools at your disposal is a collection of past papers. These are more than just old exam questions; they're a sneak peek into the structure, format, and type of problems you’ll encounter on test day.
Preparing for the Examinations Council of Zambia (ECZ) exams can be daunting, especially for challenging subjects like science and mathematics.
Access a comprehensive collection of Zed past papers with answers for download now
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