Biol 1441 practice questions with complete solutions
A dust particle floating on a water surface illustrates? Correct
Answers Surface tension
A(n) _________ is a pure substance composed of atoms.
Correct Answers Element
AB → A + B is to decomposition as A + B → AB is to? Correct
Answers Synthesis
All of the following are true concerning enzymes except that
they:
A) are proteins.
B) function as biological catalysts.
C) lower the activation energy required for a reaction.
D) affect only the rate of a chemical reaction.
E) are consumed during the reaction. Correct Answers E) are
consumed during the reaction
Atoms of the same element whose nuclei contain the same
number of protons, but different numbers of neutrons, are
called? Correct Answers Isotopes
By weight, which element is the most plentiful in the human
body? Correct Answers Oxygen
By weight, which element is the second most abundant in the
human body? Correct Answers Carbon
, Chemical reactions that yield energy, such as heat, are said to
be: Correct Answers Exergonic
Elements that have atoms with full outer shells of electrons are?
Correct Answers Inert gases
H2O is an example of a(n)? Correct Answers Molecular
formula
If an element is composed of atoms with an atomic number of 6
and a mass number of 14, then the nucleus of a neutral atom of
this element contains? Correct Answers 6 protons and 8
neutrons
If an isotope of oxygen has 8 protons, 10 neutrons, and 8
electrons, its mass number is? Correct Answers 18
If one pair of electrons is unequally shared between two atoms, a
________ occurs. Correct Answers Single polar covalent bond
In a molecule of oxygen gas, two pairs of electrons are shared
equally by two oxygen atoms. The type of bond that is formed is
an example of a? Correct Answers Double nonpolar covalent
bond
In an aqueous solution, cations are attracted toward what?
Correct Answers Anions
In an aqueous solution, sodium ions would move toward what?
Correct Answers A negative terminal
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 Classroom. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
