paper 1 Flashcards
What is the basic unit of life?
The cell.
True or False: DNA stands for Deoxyribonucleic Acid.
True.
Fill in the blank: The process by which plants make their own food is called __________.
photosynthesis.
What are the two main types of cells?
Prokaryotic and eukaryotic cells.
Which organelle is known as the powerhouse of the cell?
Mitochondria.
What is the function of ribosomes?
To synthesize proteins.
Multiple choice: Which of the following is NOT a part of the cell theory? A) All living things are made of cells B) Cells are the basic unit of life C) All cells have a nucleus D) All cells come from pre-existing cells
C) All cells have a nucleus.
What is the role of chloroplasts in plant cells?
To conduct photosynthesis.
True or False: The cell membrane is selectively permeable.
True.
What is the main purpose of the nucleus?
To store genetic information.
Define osmosis.
The movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.
Multiple choice: Which process involves the division of a cell’s nucleus? A) Cytokinesis B) Mitosis C) Meiosis D) All of the above
B) Mitosis.
Fill in the blank: The genetic material in cells is made up of __________.
DNA.
What is the purpose of the cell wall in plant cells?
To provide structure and support.
True or False: Enzymes are proteins that speed up chemical reactions.
True.
What are the four main types of macromolecules?
Carbohydrates, lipids, proteins, and nucleic acids.
Define diffusion.
The movement of particles from an area of higher concentration to an area of lower concentration.
Multiple choice: Which of the following is a function of proteins? A) Energy storage B) Catalyzing reactions C) Structural support D) All of the above
D) All of the above.
Fill in the blank: __________ are the building blocks of proteins.
Amino acids.
True or False: All cells contain a mitochondrion.
False.
What is the primary function of the plasma membrane?
To regulate what enters and exits the cell.
Define homeostasis.
The maintenance of a stable internal environment.
Multiple choice: Which structure is responsible for cell division in animal cells? A) Centrioles B) Nucleus C) Ribosomes D) Golgi apparatus
A) Centrioles.
Fill in the blank: The __________ is the jelly-like substance inside the cell.
cytoplasm.
