BIOL 1201 EXAM 1 (GREGG)
QUESTIONS & ANSWERS PASSED
ALREADY GRADED A+
plasma membrane - Correct Answer ✔✔ The membrane at the boundary of every cell
that acts as a selective barrier, thereby regulating the cell's chemical composition.
Ribosomes - Correct Answer ✔✔ complexes that make proteins; free in cytosol or
bound to rough ER or nuclear envelope
Golgi apparatus - Correct Answer ✔✔ active in synthesis, modification, sorting, and
secretion of cell products
Lysosome - Correct Answer ✔✔ digestive organelle where macromolecules are
hydrolyzed, and autophagy
Mitachondrion - Correct Answer ✔✔ organelle where cellular respiration occurs and
most ATP is generated
Cytoskeleton - Correct Answer ✔✔ reinforces cell's shape; functions in cell movement;
components are made of protein. Includes: Microfilaments, Intermediate filaments,
Microtubules.
Endoplasmic Reticulum - Correct 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 - Correct Answer ✔✔ protein synthesis
Smooth ER - Correct Answer ✔✔ lipid synthesis
calcium ion storage
poison detoxification
Nucleolus - Correct Answer ✔✔ nonmembranous structure involved in production of
ribosomes; a nucleus has one or more nucleoli
Chromatin - Correct Answer ✔✔ material consisting of DNA and proteins; visible in a
dividing cell as individual condensed chromosomes
cell wall - Correct Answer ✔✔ outer layer that maintains cell's shape and protects cell
from mechanical damage; made of cellulose, other polysaccharides, and protein
, Chloroplast - Correct Answer ✔✔ photosynthetic organelle; converts energy of sunlight
to chemical energy stored in sugar molecules
central vacuole - Correct 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. - Correct
Answer ✔✔ 2
Which of these relationships is true of an uncharged atom? - Correct Answer ✔✔ The
number of protons is equal to the number of electrons
What determines the types of chemical reactions that an atom participates in? - Correct
Answer ✔✔ the number of electrons in the outermost electron shell
What type of bond is joining the two hydrogen atoms? - Correct Answer ✔✔ covalent
A(n) _____ refers to two or more atoms held together by covalent bonds. - Correct
Answer ✔✔ molecule
This atom can form up to _____ single covalent bond(s) - Correct Answer ✔✔ 4
A(n) _____ bond joins these two oxygen atoms. - Correct Answer ✔✔ double covalent
Part complete
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?
- Correct Answer ✔✔ 6
Part complete
Which of these refers to atoms with the same atomic number but different atomic
masses? - Correct Answer ✔✔ these atoms are isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does
fluorine have? - Correct 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? - Correct Answer ✔✔ 5
A water molecule can bond to up to _____ other water molecules by ____ bonds. -
Correct Answer ✔✔ 4 .... hydrogen
Part complete
The unequal sharing of electrons within a water molecule makes the water molecule
_____. - Correct Answer ✔✔ polar
QUESTIONS & ANSWERS PASSED
ALREADY GRADED A+
plasma membrane - Correct Answer ✔✔ The membrane at the boundary of every cell
that acts as a selective barrier, thereby regulating the cell's chemical composition.
Ribosomes - Correct Answer ✔✔ complexes that make proteins; free in cytosol or
bound to rough ER or nuclear envelope
Golgi apparatus - Correct Answer ✔✔ active in synthesis, modification, sorting, and
secretion of cell products
Lysosome - Correct Answer ✔✔ digestive organelle where macromolecules are
hydrolyzed, and autophagy
Mitachondrion - Correct Answer ✔✔ organelle where cellular respiration occurs and
most ATP is generated
Cytoskeleton - Correct Answer ✔✔ reinforces cell's shape; functions in cell movement;
components are made of protein. Includes: Microfilaments, Intermediate filaments,
Microtubules.
Endoplasmic Reticulum - Correct 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 - Correct Answer ✔✔ protein synthesis
Smooth ER - Correct Answer ✔✔ lipid synthesis
calcium ion storage
poison detoxification
Nucleolus - Correct Answer ✔✔ nonmembranous structure involved in production of
ribosomes; a nucleus has one or more nucleoli
Chromatin - Correct Answer ✔✔ material consisting of DNA and proteins; visible in a
dividing cell as individual condensed chromosomes
cell wall - Correct Answer ✔✔ outer layer that maintains cell's shape and protects cell
from mechanical damage; made of cellulose, other polysaccharides, and protein
, Chloroplast - Correct Answer ✔✔ photosynthetic organelle; converts energy of sunlight
to chemical energy stored in sugar molecules
central vacuole - Correct 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. - Correct
Answer ✔✔ 2
Which of these relationships is true of an uncharged atom? - Correct Answer ✔✔ The
number of protons is equal to the number of electrons
What determines the types of chemical reactions that an atom participates in? - Correct
Answer ✔✔ the number of electrons in the outermost electron shell
What type of bond is joining the two hydrogen atoms? - Correct Answer ✔✔ covalent
A(n) _____ refers to two or more atoms held together by covalent bonds. - Correct
Answer ✔✔ molecule
This atom can form up to _____ single covalent bond(s) - Correct Answer ✔✔ 4
A(n) _____ bond joins these two oxygen atoms. - Correct Answer ✔✔ double covalent
Part complete
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons?
- Correct Answer ✔✔ 6
Part complete
Which of these refers to atoms with the same atomic number but different atomic
masses? - Correct Answer ✔✔ these atoms are isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does
fluorine have? - Correct 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? - Correct Answer ✔✔ 5
A water molecule can bond to up to _____ other water molecules by ____ bonds. -
Correct Answer ✔✔ 4 .... hydrogen
Part complete
The unequal sharing of electrons within a water molecule makes the water molecule
_____. - Correct Answer ✔✔ polar
