100% Verified Questions & Answers | Grade A
Module 1: Cell Biology (Tuesday 1-13): "The Biology of You"
What is the basic unit of life?
Cells
What must all cells do to function independently?
Be separated from their environment, control what enters and leaves, maintain homeostasis,
carry out metabolism, extract energy, build molecules, grow, and reproduce.
How do simple cells like bacteria reproduce?
Through binary fission, where one cell splits into two identical cells.
What are the two main types of cells?
Prokaryotic cells and eukaryotic cells.
What are prokaryotic cells?
Cells that include bacteria and archaea, are smaller and simpler, lack organelles and a nucleus.
What are eukaryotic cells?
Cells found in animals, plants, fungi, and protists that are larger, more complex, and contain
organelles.
What is the function of ribosomes?
To read mRNA and assemble amino acids into proteins.
, What is the structure of the plasma membrane?
A phospholipid bilayer with hydrophilic heads facing outward and hydrophobic tails facing
inward.
What is the role of the cytoplasm?
To serve as the site of many cellular chemical reactions and provide materials needed for energy
and metabolism.
What distinguishes eukaryotic cells from prokaryotic cells?
Eukaryotic cells have a membrane-enclosed nucleus and organelles, while prokaryotic cells do
not.
What are the characteristics of living organisms?
Organization, metabolism, growth, reproduction, response to stimuli, and homeostasis.
What is metabolism?
The sum of all chemical reactions in the body, including catabolism and anabolism.
What is catabolism?
The process of breaking down molecules and releasing energy.
What is anabolism?
The process of building molecules and using energy.
What is hydrolysis?
A chemical reaction that breaks bonds using water, common in catabolism.