BIOL 1201 EXAM 1 (GREGG)
QUESTIONS AND ANSWERS 100%
CORRECT
plasma membrane - ANSWER-The membrane at the boundary of every cell that acts as
a selective barrier, thereby regulating the cell's chemical composition.
Ribosomes - ANSWER-complexes that make proteins; free in cytosol or bound to rough
ER or nuclear envelope
Golgi apparatus - ANSWER-active in synthesis, modification, sorting, and secretion of
cell products
Part complete
Which of these refers to atoms with the same atomic number but different atomic
masses? - ANSWER-these atoms are isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does
fluorine have? - ANSWER-10
An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11.
How many protons does boron have? - ANSWER-5
A water molecule can bond to up to _____ other water molecules by ____ bonds. -
ANSWER-4 .... hydrogen
Part complete
The unequal sharing of electrons within a water molecule makes the water molecule
_____. - ANSWER-polar
Lysosome - ANSWER-digestive organelle where macromolecules are hydrolyzed, and
autophagy
Mitachondrion - ANSWER-organelle where cellular respiration occurs and most ATP is
generated
Cytoskeleton - ANSWER-reinforces cell's shape; functions in cell movement;
components are made of protein. Includes: Microfilaments, Intermediate filaments,
Microtubules.
, Endoplasmic Reticulum - ANSWER-network of membranous sacs and tubes; active in
membrane synthesis and other synthetic and metabolic processes; has rough
(ribosome-studded) and smooth regions
Rough ER - ANSWER-protein synthesis
Smooth ER - ANSWER-lipid synthesis
calcium ion storage
poison detoxification
Nucleolus - ANSWER-nonmembranous structure involved in production of ribosomes; a
nucleus has one or more nucleoli
Chromatin - ANSWER-material consisting of DNA and proteins; visible in a dividing cell
as individual condensed chromosomes
cell wall - ANSWER-outer layer that maintains cell's shape and protects cell from
mechanical damage; made of cellulose, other polysaccharides, and protein
Chloroplast - ANSWER-photosynthetic organelle; converts energy of sunlight to
chemical energy stored in sugar molecules
central vacuole - ANSWER-prominent organelle in older plant cells; storage, breakdown
of waste products, hydrolysis of macromolecules; enlargement of vacuole major
mechanism of plant growth.
Part complete
The innermost electron shell of an atom can hold up to _____ electrons. - ANSWER-2
Which of these relationships is true of an uncharged atom? - ANSWER-The number of
protons is equal to the number of electrons
What determines the types of chemical reactions that an atom participates in? -
ANSWER-the number of electrons in the outermost electron shell
What type of bond is joining the two hydrogen atoms? - ANSWER-covalent
A(n) _____ refers to two or more atoms held together by covalent bonds. - ANSWER-
molecule
This atom can form up to _____ single covalent bond(s) - ANSWER-4
A(n) _____ bond joins these two oxygen atoms. - ANSWER-double covalent
Part complete
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 NursingTutor1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.99. You're not tied to anything after your purchase.
