The invention of which instrument allowed scientists to discover cells?

• eyeglasses

• magnifying glass

• microscope

• telescope

Which of the structures are present in plant cells, but not in animal cells? Select all that apply.

• Nucleus

• Golgi apparatus

• Chloroplasts

• Cell wall

Basic unit of all forms of life

• Cell

• Nucleus

• Prokaryote

• Eukaryote

Structure that contains the cell's genetic material in the form of DNA

• Vacuole

• Nucleolus

• Nucleus

• Ribosome

Cell organelle that stores materials such as water, salts, proteins, and carbohydrates

• Centriole

• Vacuole

• Ribosome

• Lysosome

Property of biological membranes that allows some substances to pass across it while others cannot

• Cell Membrane

• permeable

• Selectively Permeable

• Cell Theory

Which structure is common to plant and animal cells?

• central vacuole
• chloroplast
• wall made of cellulose
• mitochondrion

What type of macromolecule are enzymes?

• Protein
• Carbohydrate
• Lipid
• Nucleic Acid

Which of the following correctly describes how enzymes work?  

• they lower the energy of the reactants to increase the rxn rate
• they supply energy to the reaction to increase the rxn rate
• they lower the energy of the products to increase the rxn rate
• they lower the activation energy of the reaction to increase the rxn rate

The part of the enzyme that the substrate bonds to is called the _____.

• active site
• activation energy
• bond site
• peptide bond