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MCQ. Concentration gradient is said to exist when the

1. concentration of ions is more inside cell and less outside cell

2. concentration of ions is lesser inside cell and more outside cell

3. hypertonic solution enters cells

4. water enters by osmosis

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What process is shown in this picture? (The blue and purple blobs are transport proteins and the green pieces are solutes.)

A.

Active transport

B.

Facilitated diffusion

C.

Osmosis

D.

Pinocytosis

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When a slice potato was placed in a solution. When the potato was taken out, the potato slice had increased in size. The solution is said to be:
A. Hypertonic
B. Hypotonic
C. Isotonic
D. None of the above

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. Joy took the notes shown below while learning about cells.
• Forms boundary between a cell and the outside environment
• Controls the movement of materials into and out of the cell
• Consists of double layer of phospholipids
She forgot to write the name of the cell structure that her class was studying that day. What structure
is described in her notes?
A. endoplasmic reticulum
B. cell membrane
C. cell wall
D. nucleus

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A. the process by which the cell takes up a substance by surrounding it with membrane
B. the process by which the cell takes up a substance by osmosis
C. the process by which the cell takes up a substance by diffusion
D. a disease of a single celled animals

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Scientist have recently shown that the wrinkles appearing on your finger tips when they have soaked in a dishwasher help us to grip objects even though our hands are wet. This wrinkling happens because the skin cells of our hand soak up water. This happens because  the skin cells are _____to the_____dish water.

A. Hypotonic; Hypertonic
B. Hypotonic; Hypotonic
C.Hypertonic; Isotonic
D.Isotonic; Ginandtonic

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 Which of the following functions does active transport perform in a cell?                  A. packaging proteins for export from the cell             

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 Which of the following functions does active transport perform in a cell?                  A. packaging proteins for export from the cell             

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B. distributing enzymes throughout the cytoplasm

C. moving substances against a concentration gradient

D.equalizing the concentration of water inside and outside the cell

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A substance is most likely to diffuse into a cell when?

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A substance is most likely to diffuse into a cell when?

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A.)it is large organic food molecule such as protein or starch.
B.)it is enclosed in an organelle such as a vaculoe
C.)the consentration of the substances is greater outside the cell than inside the cell

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Which cell process will move substances against a concentration gradient?
A.diffusion

B.  facilitated diffusion

C.osmosis

D. active transport

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the movement of molecules from a high concentration area to a low concentration area is known as

A-osmosis
B-diffusion
c-active transports
D-phagocytes

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 What is (are) the main difference(s) between passive transport and active transport?

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 What is (are) the main difference(s) between passive transport and active transport?

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A. Passive transport occurs primarily in single-cell organisms; active transport occurs primarily in multicellular organisms.
B. Passive transport does not require any cellular proteins; active transport requires cellular proteins.
C. Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
D. Active transport works against gravity (for example, upwards from the roots of a tree); passive transport works with gravity

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Which means of particle transport requires input of energy from the cell?

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Which means of particle transport requires input of energy from the cell?

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A.  Diffusion
B. Osmosis
C. Facilitated Diffusion.
D. Active Transport

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The cell membrane controls movement of materials into and out of the cell.
The following particles are moving from high concentration to low concentration and are using a
carrier protein. How would you describe this type of movement across the membrane?
A. simple osmosis
B. active transport
C. simple diffusion
D. facilitated diffusion

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Osmosis is used to move molecules across the cell membrane.  Which of the following are characteristics of osmosis.  Check two correct answers.
A. Moves molecules from high concentration to low concentration

B. Requires energy input

C. Moves molecules from low concentration to high concentration

D. Involves vesicles to move materials

E. Involves water molecules only

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When Streptococcus pneumoniae are exposed to an antibiotic, the bacteria try to pump the
antibiotic out of their cells. Which of the following mechanisms is most likely used by the
Streptococcus pneumoniae to pump the antibiotic out of their cells?
A. active transport
B. diffusion
C. facilitated diffusion
D. osmosis

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If a cell's contents are greatly hypotonic to the surrounding environment, the cell will probably

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If a cell's contents are greatly hypotonic to the surrounding environment, the cell will probably

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a. Expand

b. become isotonic
c. burst
d.shrivel

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Process that moves any material from high concentrations to low concentrations is called ____.

A. Diffusion

B. Active transport

C. Endocytosis

D. Osmosis

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What are the 2 transports of a cell?
a) active and passive
b) diffusion and facilitated
c) hypotonic and isotonic
d) hypertonic and homeostasis

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Endocytosis is a example of what type of transport?
A.active transport
B.Passive transport

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What is the organelle called that cell transport happens on
A) Nucleus
B) Mitochondria
C) Cell Membrane
D) Vacuole