Biod 101 Previous Exam Questions
And Answers With Verified Solutions
100% Correct!!! Latest Updated
2024/2025
What is matter? - ANSWER✔✔ Anything that takes up space, by having a
volume, and has mass
The foundational building blocks of proteins are the organic compounds ____,
which are held together by ____ bonds - ANSWER✔✔ amino acids; peptide
A _____ is the substance being dissolved into another substance, while the ___ is
the substance into which another substance is being dissolved - ANSWER✔✔
solute; solvent
Why are lipids insoluble in water? - ANSWER✔✔ They are made mostly of non-
polar hydrocarbon chains. As water is polar, it will only dissolve other polar or
ionically bonded substances. Lipids are non-polar, and this is why they are
insoluble in water but can be dissolved with nonpolar solvents like alcohol
What type of ion carries a negative charge? - ANSWER✔✔ anion
Which organelle of the cell contains the genetic content of the cell and serves as
the control center? - ANSWER✔✔ nucleus
What type of transport requires energy to move substances through the cell
membrane? Provide an example of this type of transport - ANSWER✔✔ Active
transport; the sodium-potassium pump is an active form of transport used to move
sodium ions out of (and potassium ions into) the cell
,True or False: Biomacromolecules are said to be monomers because they contain
many polymers - ANSWER✔✔ False; biomacromolecules are said to be polymers
because they contain many monomers
What type of cell junctions are mechanical structures that wrap arounf the cell to
prevent extracellular fluid from leaking? - ANSWER✔✔ tight junctions
Nucleic acids are polymers built from monomers called ____ - ANSWER✔✔
nucleotides
Which of the following statements is TRUE concerning eukaryotic cells?
- eukaryotic cells are typically smaller than prokaryotic cells
- eukaryotic cells do not contain internal membrane-bound organelles
- eukaryotic cells possess a nuclear membrane
- eukaryotic cells are less complex than prokaryotic cells - ANSWER✔✔
eukaryotic cells possess a nuclear membrane
True or False: trace elements are required only in small quantities - ANSWER✔✔
true
As part of the cytoskeleton, what role do microtubules serve? - ANSWER✔✔
microtubules influence cell shape, form spindles for chromosome separation
during mitosis, can be arranged in specific geometric conformations that are used
for cellular locomotion, and they serve as "roads" for organelles to travel (by way
of motor proteins)
The _____ group of a phoshpholipid is hydrophobic, whereas the ____ group is
hydrophilic - ANSWER✔✔ tail; head
,Carrier mediated transport occurs when a ____ spans the membrane, creating a
tunnel like structure that allows specific molecules to pass through via diffusion -
ANSWER✔✔ channel protein
What occurs in a dehydration reaction? - ANSWER✔✔ a water molecule is lost
from the reactant side of the chemical equation
What type of passive transport relies on the tendency of solutes to move from an
area of high concentration to an area of low concentration? - ANSWER✔✔ simple
diffusion
What are the THREE defining characteristics of prokaryotic cells? - ANSWER✔✔
1) small in size 2) lack organelles 3) non-enclosed genetic material
True or False: The two major components embedded in a cell membrane are
nucleic acids and lipids - ANSWER✔✔ False: a membrane has embedded within it
two components: phoshpholipids and proteins
Which of the following bonds generally exists between two non-metals? -
ANSWER✔✔ covalent
True or False: the electrical potential of ions across the cell membrane is an
important element for nerve conduction, muscle contraction, mitochondrial
metabolism, and hormone secretion - ANSWER✔✔ true
List THREE functions of proteins - ANSWER✔✔ 1) can form antibodies for
immune system responses 2) act as carriers to transport molecules across cell
membrane
3) act as enzymes to regulate metabolic reactions
, ______ are simple sugar carbohydrates made up of a single monomer, and _____
are complex sugars, such as glycogen - ANSWER✔✔ monosaccharides;
polysaccharides
Explain what happens to a cell when it is placed in an isotonic solution -
ANSWER✔✔ the cell will neither shrink nor swell because the solute
concentration inside the cell equals the solute concentration outside the cell
which of the following nitrogenous bases can be found in RNA? - ANSWER✔✔
cytosine, adenine, uracil, guanine
Individual living members of a population best describes an - ANSWER✔✔
organism
each of the following are true regarding eukaryotes except:
- they are larger and generally more complex than prokaryotes
- they contain a membrane bound, true nucleus
-they have cell walls composed of peptidoglycan
- they can be divided into 4 main kingdons: fungi, protista, plantae, animalia -
ANSWER✔✔ they have cell walls composed of peptidoglycan
True or False: The rRNA found in cells of the archaea domain would be identical
to those found in the eubacteria domain - ANSWER✔✔ False: rRNA is unique and
specific to organisms within each domain
_____ plants lack the formation of tubes to transport water and nutrients -
ANSWER✔✔ nonvascular
Tinea Pedia and Tinea Corporis, both mycotic infections, can be found in which
eukaryotic kingdom? - ANSWER✔✔ fungi
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