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Bio 121 Final Exam Review Questions and Correct Answers.
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- BIO 121 Ex 1 Rev- Spring 2024
Bio 121 Final Exam Review Questions and Correct Answers.
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Bio 121 Final Exam Review Questionsand Correct Answers
In a water molecule, the hydrogen atom and _____________ atom are held together by a ______ bond. -
correct answers:oxygen, covalent
This organelle contains two membrane and derives from a nonphotosynthetic ancestral prokaryotic cell.
- correct answers:mitochondria
If the ion Cl- enters a cell by moving down its concentration gradient, this would be an example of ____
transport, which ______ require a protein for transport. - correct answers:passive, does
Which of the following elements is an essential trace element? - correct answers:zinc
In what way to the membrane of a eukaryotic cell vary? - correct answers:certain proteins are unique to
each membrane
A cell with a solute concentration of 2M is placed into a solution with a solute concentration of 5M. The
cell membrane is permeable to water but not the solutes. The solution is ____ relative to the cell. In this
example, water will move ____ the cell. - correct answers:hypertonic, out of
This organelle modifies proteins by adding sugar or phosphate groups. - correct answers:Golgi
Phosphorous has 15 protons. Which of the following displays a possible molecule involving
phosphorous? - correct answers:H-P=O
The sodium potassium pump moves ions against their gradient. This pump ____ ATP to facilitate _____
transport. - correct answers:consumes, active
Bacteria are considered ____________. The novel coronavirus is considered _________. - correct
answers:living, nonliving
,A sperm cell is viable but ineffective. It has plenty of energy, but lacks the ability to swim. The damaged
organelle/structure is likely the____. - correct answers:cytoskeleton/microtubules
A denatured protein will disrupt _____ bonds, and thus affect the ________ structure of a protein. -
correct answers:Hydrogen, secondary
Consider the type of bond in table salt. The chlorine atom steals an electron from sodium, and has a
___charge, and the chlorine atom is called a __. - correct answers:negative, anion
Hydrophobic amino acids are ________, _____ in its functional group. - correct answers:nonpolar, and
most likely contains oxygen
Which of the following statements concerning atoms is false?
a. Protons are positively charged and have the same mass as electrons
b. Atoms of the various elements differ in their number of subatomic particles.
c. All atoms of a particular element have the same number of protons in their nuclei.
d. The neutrons and protons present in the nucleus of an atom have identical mass
e. An atom is the smallest unit of an element that still retains the properties of the element. - correct
answers:Protons are positively charged and have the same mass as electrons
The DNA in a chloroplast is double stranded, and organized into a circular chromosome. - correct
answers:True
E. coli cells _______ have DNA and ______ have a cell membrane. - correct answers:will, will
Polymers of polysaccharides, fats, and proteins are all synthesized from monomers by which process? -
correct answers:a dehydration reaction
Hemoglobin is a type of ______ that functions ______. - correct answers:protein, in transport
, This organelle can degrade cellular contents (e.g. proteins) and has a low pH. - correct answers:lysosome
Unsaturated fatty acids ___. - correct answers:are the predominant fatty acid in peanut oil.
Which of the following best describes the flow of information in eukaryotic cells? - correct answers:DNA
→ RNA → proteins
This organelle makes sugars by harnessing photons. - correct answers:chloroplast
Macromolecules that cells typically use for fuel, and contain glycosidic linkages, are ___. - correct
answers:carbohydrates
Plasmodesmota are found in _______ and function in ____. - correct answers:corn, cell to cell
communication by means of sharing cytoplasm
Which of the following statements concerning prokaryotic cells is correct?
a. Prokaryotic cells lack a phospholipid bilayer
b. DNA or deoxyribonucleic acid is present in the nucleus of prokaryotic cells.
c. Prokaryotic cells contain DNA in a nucleus
d. None of the above
e. Prokaryotic cells contain a cell wall - correct answers:Prokaryotic cells contain a cell wall
Which of the following factors would tend to increase membrane flexibility. - correct answers:a greater
proportion of unsaturated phospholipids
This organelle is a site of phospholipid synthesis and other lipids. - correct answers:smooth ER
A cell contains a cell membrane and a lysosome, but lacks a chloroplast and cell wall. This cell is from a
_____. - correct answers:rhino
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