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Parts of a Cell Membrane

Descripción

Parts of a cell membrane along with a little review from parts of cell, macromolecules, and atoms.
Selam H
Test por Selam H, actualizado hace más de 1 año
Selam H
Creado por Selam H hace alrededor de 9 años
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Resumen del Recurso

Pregunta 1

Pregunta
In the diagram below, which letter points to a structure that helps with cell attachment, signaling, and recognition of substances?
Image:
1f0901e3-b115-4519-a0a0-1bec37af1a75 (image/jpeg)
Respuesta
  • Structure E
  • Structure D
  • Structure I
  • Structure A
  • Nome of these

Pregunta 2

Pregunta
Which letter is pointing to a protein?
Image:
f2cbadae-2272-4ac8-a6a6-22d1a566e9d9 (image/jpeg)
Respuesta
  • Structure C
  • Structure F
  • Structure E
  • Structure D
  • Structure H

Pregunta 3

Pregunta
Which letter points to a part that is polar and hydrophilic?
Image:
dc51655a-8451-4c30-bba6-8f54189da4e4 (image/jpeg)
Respuesta
  • Structure E
  • Structure J
  • Structure D
  • Structure H

Pregunta 4

Pregunta
What is the composition of the nucleus of an atom?
Respuesta
  • Ions and Electrons
  • Electrons and Protons
  • Protons and Nuetrons
  • Neutrons and Electrons

Pregunta 5

Pregunta
The diagram illustrates the use of energy by a nerve cell to expel a sodium ion from the inside of the cell. Which of these would best explain why ATP energy is needed to complete this function?
Image:
b9dc9855-e341-4816-8dc0-7d3b91938e2a (image/png)
Respuesta
  • The ion is being transported against the concentration gradient.
  • The ion has more kinetic energy than the surrounding molecules.
  • The ion is a waste product that is digested by the cell membrane.
  • The ion is too large to pass through the cell membrane by diffusion.

Pregunta 6

Pregunta
Which of these statements correctly describes an example of how monomers combine and create macromolecules?
Respuesta
  • Amino Acids combine and make proteins.
  • Nucleic acids combine and make starch.
  • Glucose molecules combine and make nucleic acids.
  • Proteins combine and make amino acids.

Pregunta 7

Pregunta
Cell membranes allow some molecules to move freely across membranes while others are restricted. Which term best describes this capability of a cell membrane?
Respuesta
  • Impervious
  • Permeable
  • Semi-permiable
  • Diffusion
  • Synthesis

Pregunta 8

Pregunta
In the diagram shown here, which of these would best explain why the cells shrunk?
Image:
31402e37-ef2c-497b-bdd9-e9be2b779515 (image/png)
Respuesta
  • They are in a hypotonic solution.
  • They are in a hypertonic solution.
  • They are infected with a bacterium.
  • They are infected with virus.

Pregunta 9

Pregunta
What property of water allows it to dissolve many different substances?
Respuesta
  • It is a polar molecule.
  • It contains hydrogen molecules.
  • It has a high specific heat.
  • It has low density.

Pregunta 10

Pregunta
Active transport is a term for the movement of molecules from...
Respuesta
  • an area of low concentration to high concentration.
  • areas of equal concentration back and forth.
  • an area of high concentration to low concentration.
  • a negative charge to a positive charge.

Pregunta 11

Pregunta
Water will move out of a cell when the cell is placed into a solution that is...
Respuesta
  • hypotonic
  • isotonic
  • hypertonic
  • pure water

Pregunta 12

Pregunta
Molecules, such as water, oxygen, and carbon dioxide, move across the cell membrane by...
Respuesta
  • facilitated diffusion.
  • simple diffusion.
  • endocytosis and exocytosis
  • protein pumps

Pregunta 13

Pregunta
When energy is not required to move molecules across a cell membrane, the process is called...
Respuesta
  • active transport.
  • passive transport.
  • concentration gradient.
  • isolation of solutes.

Pregunta 14

Pregunta
The major difference(s) between active and passive transport is...
Respuesta
  • active transport involves the use of proteins while passive is not.
  • active transport is faster than passive transport.
  • active transport requires energy while passive does not.
  • active transport most often moves against the concentration gradient.
  • both of these: active transport requires energy while passive does not AND active transport most often moves against the concentration gradient.

Pregunta 15

Pregunta
Which part of the cell membrane is hydrophobic?
Respuesta
  • proteins
  • cholesterol
  • phosphate heads
  • lipid tails

Pregunta 16

Pregunta
Why do cells not dissolve in water?
Respuesta
  • Because the proteins in the cell membrane have covalent bonds between amino acids.
  • Because the phosphate heads of the cell membrane are polar and attract to water.
  • Because the fatty acid tails of the cell membrane phospholipids are nonpolar.
  • Because the cytoplasm has a slightly negative charge and prevents water from entering the cell.

Pregunta 17

Pregunta
The structure of the cell membrane is composed of a bilayer consisting of...
Respuesta
  • phosphates and lipids.
  • carboxyl and amino acids.
  • phosphates and proteins.
  • proteins and lipids.

Pregunta 18

Pregunta
All cells, prokaryotic and eukaryotic, have a few common features. Which of the following is found in both cells?
Respuesta
  • Ribosomes
  • Nuclear Membrane
  • Nucleus
  • RER
  • Both ribosomes and nucleus

Pregunta 19

Pregunta
Which part of an atom has the least mass?
Respuesta
  • Nucleus
  • Nuetron
  • Electron
  • Proton
  • They all have relatively the same mass.

Pregunta 20

Pregunta
If an atom has 8 protons and 9 electrons, then the atom is...
Respuesta
  • a cation.
  • an anion.
  • neutral.
  • polar.

Pregunta 21

Pregunta
Which part of the cell is responsible for cell growth and is responsible for metabolism?
Respuesta
  • chloroplasts
  • cytoplasm
  • ribosomes
  • nucleolus
  • mitochondria

Pregunta 22

Pregunta
Each beaker shown here contains a cell in a solution. (The white oval shape = cell.) Which of these beakers and cell would be considered isotonic?
Image:
71247c3b-e543-42f6-bd10-f416f0f51ea8 (image/png)
Respuesta
  • Beaker 1
  • Beaker 2
  • Beaker 3
  • Beaker 4
  • Beakers 2 and 4

Pregunta 23

Pregunta
In beaker number 3, what would happen to the water?
Image:
6d93ecb8-1c07-4458-bbf4-e7553c4c50cf (image/png)
Respuesta
  • It would move into the cell by osmosis.
  • It would move out of the cell by osmosis.
  • It would move into the cell by diffusion.
  • It would move out of the cell by diffusion.

Pregunta 24

Pregunta
What type of molecule help hold the lipid tails together in the cell membrane?
Respuesta
  • A Carbohydrate
  • A Protein
  • A Cholesterol
  • A Carboxyl group

Pregunta 25

Pregunta
What type of bond is most often found between carbon and other elements in organic compounds?
Respuesta
  • ionic
  • covalent
  • hydrogen
  • polar

Pregunta 26

Pregunta
The high specific heat of water provides what function in living things?
Respuesta
  • It helps cool the body.
  • It helps the environment stay warmer.
  • It allows molecules to dissolve.
  • It helps it flow through plants.

Pregunta 27

Pregunta
The chemical structure of starch is shown here. Based on this diagram, starch is a...
Image:
23b843ad-33be-4f3a-9d81-8a2723844dae (image/png)
Respuesta
  • monomer.
  • polymer.
  • nucleotide.
  • polypeptide.
  • disaccharide.

Pregunta 28

Pregunta
The chemical formula for glucose and fructose are C6H12O6. The structural for each of these molecules are shown. Based on the information given, glucose and fructose would be considered...
Image:
dabe84b5-b1f6-455a-9eb1-58e05b65bd26 (image/png)
Respuesta
  • monomers of each other.
  • polymers of one another.
  • isotopes.
  • isomers.

Pregunta 29

Pregunta
Which of the following is not part of the cell membrane?
Respuesta
  • Carbohydrates
  • Lipids
  • Proteins
  • Nucleic Acids
  • All of these are a part of the cell membrane.

Pregunta 30

Pregunta
If the concentration of the solute of sugar is 1% outside of the cell and 3% inside of the cell, which of the following would occur by diffusion?
Respuesta
  • The sugar will move into the cell with the help of ATP by diffusion.
  • The sugar will move out the cell without the help of ATP by diffusion.
  • The sugar will move into the cell without the help of ATP by diffusion.
  • The sugar will move out the cell with the help of ATP by diffusion.

Pregunta 31

Pregunta
Which structure collects and sends molecules to leave the cell by osmosis?
Respuesta
  • Mitochondria
  • Ribosomes
  • Cell membrane
  • Golgi Bodies

Pregunta 32

Pregunta
Marta investigates how water temperature affects the breathing rate of five goldfish. She records the water temperature and counts the number of gill movements of each fish for one minute. Marta slowly raises the water temperature 2 degrees Celsius and then repeats her observations. What is the independent variable in this investigation?
Respuesta
  • Number of goldfish
  • Water Temperature
  • Number of gill movements
  • Observation time

Pregunta 33

Pregunta
What process moves a small, neutral atom through the cell membrane?
Respuesta
  • Direct transfer through phospholipids.
  • Exocytosis
  • Active Transport
  • Facilitated Diffusion
  • Osmosis

Pregunta 34

Pregunta
Which of these moves a large amount of a liquid substance into a cell?
Respuesta
  • Exocytosis
  • Osmosis
  • Phagocytosis
  • Pinocytosis

Pregunta 35

Pregunta
A cell placed in a solution. After 24 hours, its volume has increased in size 3%. In what type of solution was it placed?
Respuesta
  • hypotonic
  • hypertonic
  • isotonic
  • could be hypotonic or hypertonic

Pregunta 36

Pregunta
Cations moving through a protein in the cell membrane are entering the cell through what process?
Respuesta
  • active transport
  • facilitated diffusion
  • osmosis
  • exocytosis

Pregunta 37

Pregunta
A cell has 5% glucose and the solution surrounding it is 10% glucose, making the cell [blank_start]hypotonic[blank_end] compared to the solution.
Respuesta
  • hypotonic

Pregunta 38

Pregunta
If a cell filled with 5% glucose is in a solution with 10% glucose, the glucose will move [blank_start]into[blank_end] the cell by [blank_start]diffusion[blank_end], and the water will move [blank_start]out of[blank_end] the cell by [blank_start]diffusion[blank_end].
Respuesta
  • into
  • out of
  • diffusion
  • osmosis
  • into
  • out of
  • diffusion
  • osmosis

Pregunta 39

Pregunta
In the diagram of a cell membrane, which structure would be an ion channel?
Image:
d10b6cc3-1213-40ac-bc75-4088d42e1a01 (image/png)
Respuesta
  • Structure A
  • Structure B
  • Structure C and F
  • Structure E
  • Structure G

Pregunta 40

Pregunta
Which structure would be a lipid?
Image:
72d0d480-36fe-4d6c-b418-9c9dff473534 (image/png)
Respuesta
  • Structure B
  • Structure G
  • Structure E
  • Structure F
  • None of these

Pregunta 41

Pregunta
The use of vesicles to transport substances across the cell membrane out of the cell is called...
Respuesta
  • facilitated diffusion.
  • a protein pump.
  • endocytosis.
  • exocytosis.
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