Molecular and Cellular Biology Exam Questions With Correct Answers
2 views 0 purchase
Course
Molecular and Cellular Biology
Institution
Molecular And Cellular Biology
Molecular and Cellular Biology Exam
Questions With Correct Answers
Atom - answerone of the smallest and most fundamental units of matter
Nucleus - answerCenter of an atom; composed of a neutron (no electrical charge) and
protons (positively charged).
Atomic Number - answerRefers to the number ...
BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
Molecular and Cellular Biology Exam
Questions With Correct Answers
Atom - answer✔✔one of the smallest and most fundamental units of matter
Nucleus - answer✔✔Center of an atom; composed of a neutron (no electrical charge) and
protons (positively charged).
Atomic Number - answer✔✔Refers to the number of protons in an atom's nucleus
Mass Number - answer✔✔The number of protons and neutrons in an atom's nucleus.
Valence Shell - answer✔✔An atom's outermost shell involves in chemical reactions with other
atoms; Atoms can fill their outermost shell with up to 8 electrons.
Chemical Bonds - answer✔✔An attraction between two atoms resulting from a sharing of outer-
shell electrons. The bonded atoms gain complete outer electron shells.
Molecule - answer✔✔A group of atoms joined by a chemical bond
Compound - answer✔✔A molecule made up of at least two different atoms.
All compounds are molecules, but - answer✔✔not all molecules are compounds
Ionic Bond - answer✔✔When one atom donates an electron to another atom.
Covalent Bond - answer✔✔Stronger of the two chemical bonds; Most common bond; Forms
when two atoms share electrons.
In macromolecules: On subunit loses a hydroxyl group (OH) another loses an atom of Hydrogen
(H).
Organic Molecule - answer✔✔When a molecule contains carbon and hydrogen atoms;
, BRIGHTSTARS EXAM STUDY SOLUTIONS 8/15/2024 2:05 PM
Macromolecules - answer✔✔Large organic molecules that contain many atoms and repeating
units
Four Main Macromolecules - answer✔✔Proteins, lipids, carbohydrates, and nucleic acids.
Inorganic Molecules - answer✔✔Contain a small number of atoms held together by ionic bonds;
often contain metals and nonmetals
The hydrogen and oxygen atoms in water are held together by a ..... bond - answer✔✔Covalent
Bond
Polar Bond - answer✔✔A covalent bond in which electrons are shared unequally; (ex. water:
Oxygen carries a partial negative charge while hydrogen carries a partial positive charge).
Hydrogen Bond - answer✔✔When the negative end of one polar molecule binds to a slightly
positive hydrogen atom on another polar molecule; a weak chemical bond
Cohesion - answer✔✔The attraction between two water molecules (polar molecules attracted to
each other)
Surface Tension - answer✔✔the cohesive force at the surface of a body of liquid that prevents
the molecules from separating
Adhesion - answer✔✔An attraction between molecules of different substances
Capillary action - answer✔✔Created by adhesion; Allows water to "climb" against gravity (in
plants and in tubes)
Specific Heat - answer✔✔The amount of energy required to raise the temperature of 1 gram of a
substance by 1 degree celcius; (Water heats slowly, but maintains its temperature for a long
period of time). Hydrogen Bonds influence this.
Water is referred to as the Universal Solvent because... - answer✔✔Its polarity allows it to
dissolve other polar substances.
Dehydration Synthesis - answer✔✔A chemical reaction in which two molecules covalently bond
to each other with the removal of a water molecule.
Proteins - answer✔✔Built from amino acids
Enzymes - answer✔✔important proteins that catalyze the chemical reactions of a cell
Carbohydrates - answer✔✔Polymers made up of carbon, hydrogen, and oxygen atoms; Sugars
that store energy
Lipids - answer✔✔Built from fatty acids and glycerol; plays a role in energy storage and in the
structure of membranes
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Brightstars. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
