Cells

Concept: Cell Theory

11m

Concept: Prokaryotes vs. Eukrayotes

9m

Cells Additional Practice Problems

Why is it possible to separate different components of the cell by centrifugation? In what order will mitochondria, chloroplasts, and ribosomes separate?

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Why can cell membranes be polar?

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In this organelle, chemical energy from sugars, proteins, and fats are used to make energy for the cell, particularly in respiration and aerobic metabolism.

A. nucleus

B. ribosome

C. rough endoplasmic reticulum

D. mitochondrion

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Explain how prokaryotes and eukaryotes are different.

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What is the function of the lysosome? What is the majority of its membrane proteins doing?

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List three similarities in functiorn between cristae and thylakoid membranes.

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Name two similarities in the structure or function of chloroplasts and mitochondira. Name two differences. 



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The anchoring body in a eukaryotic flagella is identified as a structure with ______. 

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Membrane proteins move laterally in a phospholipid bilayer but generally not up and down. Why would this be so?

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You need to add roughly 1 x 10^6 cells/mL into a vial to be frozen down. But before doing this, you need to add 10% DMSO.

How much DMSO and media need to be added to your 1mL of 3 x 10^6 cells/mL?

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List two specific cell components or organelles that are found in: 

(a) all living cells 

(b) plant, but not animal cells

(c) all eukaryotic, but not prokaryotic cells

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For each of the items listed below, select the one best answer from the list and place the corresponding letter in the space provided.

i. __ Contain plasmodesmata

ii. __ Contain Lysosomes but not a central vacuole

iii. __ Contain mitochondria

iv. __ Contain flagella or cilia

v. __ Contain plastids

vi. __ Contain actin

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For each of the items listed below, select the one best answer from the list and place the corresponding letter in the space provided.

i. ___ Contain Golgi bodies

ii. ___ Contain DNA as their genetic information

iii ___ Contain cytoplasmic 70S ribosomes

iv. ___ Perform both transcription and translation

v. ___ Are enclosed in an envelope consisting of two membranes.

vi. ___ mRNA contains a poly-A tail and a modified G cap

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Most living cells are small in size because they need a large ratio of surface area to volume.

a. True

b. False

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Most living cells are small in size because they need a small ratio of surface area to volume. 

a. True

b. False

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An understanding of cellular biology is helping us find new treatments for many diseases. 

a. True

b. False

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What is the selective advantage of keeping the surface to volume ratio low in a cell? 

a. Maximize the relative surface area to exchange nutrients and gasses

b. Maximize the relative surface area for cooling

c. Provide more volume to store more organelles

d. Provide more volume to store more nutrients

e. Saves energy by making more membrane relative to the volume of the cell

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A structure found in prokaryotic cells, plant cells, and animal cells is a: 

a. Cell wall

b. Chloroplast

c. Ribosome

d. Mitochondria

e. Cilium

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A eukaryotic cell: 

a. Has a cell wall with peptidoglycan

b. Is usually smaller than a prokaryotic cell

c. Does not have membrane-bounded organelles

d. Has membrane-bounded organelles

e. Does not usually have a nucleus

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A prokaryotic cell: 

a. Has a nucleus

b. Does not have a nucleus

c. Has a cell wall made of chitin

d. Is at least ten micrometers in diameter

e. Has membrane-bounded organelles

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Ribosomes are

a. only DNA molecules

b. only RNA molecules

c. single, naked, and circular chromosomes

d. only protein molecules

e. large molecular aggregates of protein and RNA

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Which of the following is not present in all eukaryotic cells?

a. endoplasmic reticulum

b. ribosome

c. plasma membrane

d. cell wall

e.Golgi bodies

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The cytoplasmic space in eukaryotic cells is occupied by many diverse membrane-bound structures with specific cellular functions. These are called

a. flagella

b. organelles

c. cilia

d. chromosomes

e. receptors

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Some of the functions of the eukaryotic organelles are performed in bacteria by the

a. plasma membrane

b. nucleoid area

c. cell wall

d. capsule

e. flagella/cilia

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Which of the following is not bounded by membranes?

a. endoplasmic reticulum

b. Golgi body

c. nucleoid

d. nucleus

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Small cells function more effectively, because as cells become larger their surface area to volume ratio

a.  increases

b. decreases

c. stays the same

d. is squared

e. is cubed

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Which cellular structure is common to both prokaryotic and eukaryotic cells?

a. Nucleus

b. Endoplasmic reticulum

c. Mitochondria

d. Plasma membrane surrounding the cell

e. Membrane-bound vesicles within the cell

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