Docsity
Docsity

Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity


Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan


Guidelines and tips
Guidelines and tips

Cell Biology Exam 1 Practice Test Questions with Corre, Exams of Nursing

Cell Biology Exam 1 Practice Test Questions with Corre

Typology: Exams

2024/2025

Available from 07/02/2025

lisa-writer
lisa-writer 🇺🇸

815 documents

1 / 8

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Cell Biology Exam 1 Practice Test
Questions with Correct Answers
Endosomes - ANSWERSSorting of endocytosed material
Membrane-bound organelles - ANSWERSIf a cell does not have a membrane-bound
nucleus, it is also not likely to have
Cell membrane - ANSWERSWhich of the following structures is characteristic of both
eukaryotic and prokaryotic cells?
Endocytic pathway - ANSWERSAlong which pathway do materials or the plasma
membrane move into the cell from the outside to cytoplasmic
compartments?
Vesicles - ANSWERSThe products of the endoplasmic reticulum are transported to the
Golgi apparatus by?
Mitochondria - ANSWERSMuscle cells require more energy in order to function than
most other cells. Therefore, muscle cells would be
expected to have more ________ than most other cells.
Cilia - ANSWERSWhich of the following would most likely be associated with the
surface of cells and provide a brushing motion,
thereby moving materials over the surface of the cells?
The two types of tetramers associate to form an octamer - ANSWERSStudies of
nucleosomes have shown that histones (except H1) exist in each nucleosome as two
kinds of
tetramers: one of 2 H2A molecules and 2 H2B molecules, and the other as 2 H3 and 2
H4 molecules. Which of
the following is supported by this data?
That the critical function of telomeres must be maintained - ANSWERSThe DNA of
telomeres has been found to be highly conserved throughout the evolution of
eukaryotes. What
does this most probably reflect?
pf3
pf4
pf5
pf8

Partial preview of the text

Download Cell Biology Exam 1 Practice Test Questions with Corre and more Exams Nursing in PDF only on Docsity!

Cell Biology Exam 1 Practice Test

Questions with Correct Answers

Endosomes - ANSWERSSorting of endocytosed material Membrane-bound organelles - ANSWERSIf a cell does not have a membrane-bound nucleus, it is also not likely to have Cell membrane - ANSWERSWhich of the following structures is characteristic of both eukaryotic and prokaryotic cells? Endocytic pathway - ANSWERSAlong which pathway do materials or the plasma membrane move into the cell from the outside to cytoplasmic compartments? Vesicles - ANSWERSThe products of the endoplasmic reticulum are transported to the Golgi apparatus by? Mitochondria - ANSWERSMuscle cells require more energy in order to function than most other cells. Therefore, muscle cells would be expected to have more ________ than most other cells. Cilia - ANSWERSWhich of the following would most likely be associated with the surface of cells and provide a brushing motion, thereby moving materials over the surface of the cells? The two types of tetramers associate to form an octamer - ANSWERSStudies of nucleosomes have shown that histones (except H1) exist in each nucleosome as two kinds of tetramers: one of 2 H2A molecules and 2 H2B molecules, and the other as 2 H3 and 2 H4 molecules. Which of the following is supported by this data? That the critical function of telomeres must be maintained - ANSWERSThe DNA of telomeres has been found to be highly conserved throughout the evolution of eukaryotes. What does this most probably reflect?

Functions of Microfilaments - ANSWERSMuscle contraction, cell division, maintenance of cellular shape in animal cells, Amoeboid movement, Cytoplasmic streaming Nucleosome, 30-nm chromatin fiber, looped domain - ANSWERSWhich of the following represents the order of increasingly higher levels of organization of chromatin (30-nm chromatin fiber, Looped domain, Nucleosome)? Addition of tubulin subunits to each end - ANSWERSElongation of the microtubule occurs by the? Centrosome - ANSWERSThe minus (-) ends of microtubules are often anchored at the ________________ , such that the dynamics associated with microtubules is at the plus (+) ends. Role of Microfilaments - ANSWERSMuscle cell contraction, , , Cell migration. Moved by Molecular Motors - ANSWERSWhat is in common about Secretory vesicles, Cytoskeletal filaments, The Golgi complex, Chloroplasts Cis-Golgi and the Medial Golgi - ANSWERSWhich part of the Golgi complex is closest to and sends material to the plasma membrane?

    • ANSWERS_________________ is the molecular motor used by transport vesicles carrying cargo from the plasma membrane to the early endosome Intermediate filaments - ANSWERSResist shear forces and contain keratin to form the protective barrier of the skin. Microvilli - ANSWERSActin bundles give shape and support to the ________ found in cells of the small intestine. Lamellipodia - ANSWERSAre thin sheets of cytoplasm used for cell movement
    • ANSWERSWhat would happen to the movement of vesicles toward their eventual target if a drug that promotes the hydrolysis of GTP bound to tubulin was added to cells? Outer doublets; central pair - ANSWERSThe "9 + 2" pattern of the flagella is nine ________ of microtubules and two additional microtubules in the center called the? Nonmuscle myosins - ANSWERSIn addition to microtubule motor proteins, ________ are also involved in vesicular transport.

culture. Antibodies to GFP are readily available. To determine the specific region of the Golgi apparatus the protein is located in, the protein can be visualized by? -Soluble secreted proteins -ER membrane proteins -Plasma membrane proteins - ANSWERSAfter isolating the rough endoplasmic reticulum from the rest of the cytoplasm, you purify the RNAs attached to it. Which of the following proteins do you expect the RNA from the rough endoplasmic reticulum to encode? In vitro systems (cell-free) - ANSWERSStudies of cell physiology that occur in test tubes that do not contain whole cells are called? Mitochondria - ANSWERSYou discover a fungus that contains a strange star-shaped organelle not found in any other eucaryotic cell you have seen. On further investigation you find the following: The interior of the organelle contains proteins similar to those of many bacteria This organelle is most likely a? They are found in all eucaryotic cells that respire (aerobic) - ANSWERSWhich one of the following statements is TRUE for mitochondria only, and not for both mitochondria and chloroplast? Treating the culture with a drug that dissolves cell walls. - ANSWERSYou have grown a culture of human cells and discover that it is heavily contaminated with bacteria. Which of the following procedures will most likely eliminate the bacteria without killing the human cells? Mitosis - ANSWERSThe cells produced by _____________ are genetically identical? Viruses - ANSWERSWhich of the following can ONLY be viewed by electron microscopy? Matrix - ANSWERSWhich of the following is NOT generally associated with a chloroplast? (Thylakoids, Grana, Stroma, Matrix) Intermediate filament - ANSWERSA(n) ________ is composed of tetrameric protofilaments?

Oxygen dependent ATP synthesis does not require a membrane-enclosed compartment. - ANSWERSThe proposed mechanism of ATP synthesis by mitochondria is based on several lines of experimental evidence. Which of the following statements is NOT consistent with this model? A)Artificial proton gradients established by addition of acid can drive ATP synthesis in the absence of electron transport B) Oxygen dependent ATP synthesis does not require a membrane-enclosed compartment. C) Electron transport causes protons to be pumped out of the mitochondrial matrix. D) The proton gradient established by electron transport has enough energy for ATP synthesis. E) Respiratory inhibitors abolish both the proton gradient and ATP synthesis Light energy Oxygen ATP Carbon dioxide - ANSWERSChloroplasts can be thought of as mitochondria working in reverse because they make sugars from ____________ and produce _____________ while mitochondria breakdown sugars to __________ and consume _____________? Stroma - ANSWERSThe synthesis of glucose from carbon dioxide occurs in the? Nucleolus - ANSWERS- Site of ribosome synthesis and assembly Endoplasmic Reticulum (ER) - ANSWERSThe first place where proteins are glycosylated Mitochondria - ANSWERSThis organelle produces carbon dioxide Cytosol - ANSWERS- Contains many metabolic pathways

  • Protein synthesis
  • the Cytoskeleton Nucleus - ANSWERS- Contains main genome
  • DNA and RNA synthesis
  • Double membrane with pores
  • Chromosome binding sites in inner membrane Endoplasmic Reticulum (ER) - ANSWERS- Synthesis of most lipids
  • Synthesis of proteins for distribution to many organelles and to plasma membrane
  • Maintain proper pressure within the plant Electron Microscopy - ANSWERSWhat microscopy? Comparison of Mitochondria and Chloroplast - ANSWERS Thylakoid - ANSWERS- Epicenter for photosynthesis light reactions
  • Contain chlorophyll (light-collecting pigment) Granum - ANSWERS- Stack of thylakoids
  • Allow for optimum surface area Stroma - ANSWERS- Soluble portion of chloroplast
  • Site of CO2 fixation
  • Sugar and protein synthesis
  • Site of DNA Matrix - ANSWERS- Citric acid cycle takes place (atp production)
  • Contains mitochondrial DNA inside Nucleoid Membrane Proteins - ANSWERSER, Golgi, lysosome, vacuole, plasma Membrane are/made of? Soluble Proteins - ANSWERSER, Golgi, lysosome, vacuole, Secreted proteins are/made of? Golgi Apparatus - ANSWERS- Flattened vesicles in stacks
  • Receives proteins in vesicles from ER (cis face)
  • Formation of secretory vesicles (sort protein for final destination---exit trans face) Nucleosome - ANSWERS- Basic structural unit
  • DNA wrapped around protein core (8 Histones, "+")
  • "Beads on string"
  • Packed into fibers (30nM)
  • Loops pack forming the chromosome
  • Histone tail modif. determine its packing Heterochromatin vs Euchromatin - ANSWERS1: Most highly condensed interphase chromosome structure, not expressed, centromere/telomore 2: Not highly condensed ICS, expressed Centromere - ANSWERS- Constricted region of chromosome
  • Contains the Kinetichore: attachment site for spindle microtubules Telomere - ANSWERS- Repeated DNA at chromosome end
  • Telomerase adds after replication
  • Protects DNA end from damage
  • Length decreases with age Myosin - ANSWERS- Motor protein
  • Binds actin Cell cortex - ANSWERS- Meshwork of fibrous proteins on cytoplasmic surface of membrane Tight junctions vs Adheren junctions - ANSWERS1: Integral membrane proteins sealing region b/t neighboring cells, prevents diffusion 2: Integral membrane protein, Cadherin, of one cell binds cadherin of other cell Confocal microscope - ANSWERS- Fluorescence microscope with Laser
  • Look at thin section of cell