Once proteins have been produced at the ribosomes, what two organelles work together to aid in the secretion process described above?

mitochondria and rough endoplasmic reticulum

What is the purpose of a protein channel?

to assist in the movement of substances across the membrane by facilitated diffusion or active transport

can only move substance into the cell with the use of ATP

is only used to remove large waste products from the cell

are specifically meant to carry the smallest ions in and out of the cell

Which statement below best identifies this form of cellular transport?

Endocytosis, because a vesicle is being formed to bring molecules from outside the cell into the cell.

Facilitated diffusion, because energy is not being used as a channel protein allows molecules to move with the concentration gradient.

Osmosis, because energy is not being used to move water molecules with the concentration gradient.

Active transport, because energy is being used to move molecules against the concentration gradient.

Which statement below best identifies this form of cellular transport?

Facilitated diffusion, because energy is not being used as a carrier protein allows molecules to move with the concentration gradient.

Active transport, because energy is being used to move molecules against the concentration gradient.

Osmosis, because energy is not being used to move water molecules with the concentration gradient.

Endocytosis, because a vesicle is being formed to bring molecules from outside the cell into the cell.

An investigation involving osmosis and plant cells was performed by a group of students. Sweet potatoes were used as the source of plant cells in the experiment. A sweet potato was diced into evenly sized and shaped cubes and placed in beakers containing various glucose concentrations. The experimental setup is shown in the table here. Beaker Number | Concentration of Glucose in the Cell | Concentration of Glucose in the Beaker | Effect on the Cell 1 | 0.5 M | 1.5 M | ? 2 | 0.5 M | 1.0 M | ? 3 | 0.5 M | 0.5 M | ? 4 | 0.5 M | 0.25 M | ? Which statement describes the most likely results seen in beaker 3?

A. Water will enter and leave the cells at the same rate via osmosis.

B. Water will enter the cells at a greater rate due to the simple diffusion of molecules.

C. Water will leave the cells at a greater rate than it enters the cells due to active transport.

D. Glucose molecules will move from the cells into the solution in the beaker through facilitated diffusion.

Biology students used raw eggs in an experiment on tonicity and osmosis. The students put their eggs into vinegar to remove the shells. The vinegar was used to remove the shell from the raw egg. What other effect(s) did the vinegar have on the egg?

The vinegar solution was hypotonic, causing the egg to gain mass.

The vinegar solution was hypotonic, causing the egg to lose mass.

The vinegar solution was hypertonic, causing the egg to gain mass.

The vinegar solution was isotonic to the egg so the mass remained constant.

Grace sprays perfume in one corner of a room. After a while, the scent spreads throughout the room. Describe the movement of perfume molecules in this scenario.

Molecules are moving from a higher concentration to a lower concentration.

Molecules are moving from a lower concentration to a higher concentration.

Molecules are moving from a higher concentration to a lower concentration and then from a lower to higher concentration.

Molecules are moving from a lower concentration to a higher concentration and then from a higher concentration to a lower concentration.

Which statement concerning osmosis and active transport is correct?

Active transport requires cell energy while osmosis does not.

Both endocytosis and active transport require cell energy.

Neither facilitated diffusion nor osmosis requires cell energy.

Diffusion of gases and other small molecules requires no energy on part of the cell.

Which statements best summarize the experimental data from the student's osmosis experiment with dialysis tubing bags of different sucrose concentrations?

The percent change in mass decreased as the sucrose concentration increased.

All bags gained mass regardless of sucrose concentration.

The percent change in mass increased as the sucrose concentration increased.

There was no change in mass for any of the bags.

Charlotte places a cell that contains 1% salt and 99% water into a solution that contains 4% salt and 96% water, as shown in the diagram. Where will the water move?

Equally in & out - it's isotonic

Zoe is learning about how different materials can act as barriers or gates in everyday life. She wonders how the structure of a security gate at a building entrance is similar to the structure of a cell membrane in living organisms. Which explanation best describes how the structure of the cell membrane contributes to its function?

The cell membrane is composed of a phospholipid bilayer with embedded proteins, allowing selective permeability.

The cell membrane is rigid, providing structural support.

The cell membrane is made of cellulose, providing a barrier to all substances.

The cell membrane is a single layer of lipids, allowing free passage of all molecules.

Unit 2 Exam USR- [BXDVHJUGGJ]

Authored by Carrie Webb

Science

9th Grade

NGSS covered

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41 questions

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MATCH QUESTION

30 sec • 1 pt

Can you match the cellular organelles to their function?

Nucleus

Stores DNA

Chloroplast

A storage tank

Vacuole

Site of photosynthesis in some cells.

Ribosome

Site of cellular respiration

Mitochondria

Site of protein synthesis

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The semi-fluid stuff that is found within any cell. Contains dissolved salts. What is this called?

Cytoplasm

Nucleus

Mitochondria

Cell wall

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In plant cells, provides support. What is this structure called?

Cell wall

Chloroplast

Nucleus

Vacuole

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A cross section of part of a Golgi complex is shown below. Part of the membrane of the Golgi complex pinches off and moves away. Which of the following is a function of this process?

to release energy from ATP

to collect amino acids for use in protein synthesis

to deliver proteins to other locations in the cell

to send messages about cell requirements to the nucleus

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The table here shows four distinct types of cells with the presence or absence of particular organelles denoted by a '+' or '-'. Which cell type (I, II, III, or IV) contains all the listed organelles?

III

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The table here shows four distinct types of cells with the presence or absence of particular organelles denoted by a '+' or '-'. Which cell type (I, II, III, or IV) lacks a nucleus?

III

Tags

NGSS.MS-LS1-2

NGSS.MS-LS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A researcher claims that all living cells must be able to synthesize proteins in order to maintain homeostasis and perform basic functions. What statement supports the scientist's claim?

Ribosomes are required for protein synthesis, and all four cell types can synthesize proteins.

Nuclei house the DNA, which is the blueprint for proteins. Cell types I, II, and III can synthesize proteins.

Cell walls are required for cells to maintain their shape to manufacture proteins. Cell types II, III, and IV can synthesize proteins.

Cells require lysosomes to digest cellular components to convert them into proteins. Only cell types I and III can synthesize proteins.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

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Unit 2 Exam USR- [BXDVHJUGGJ]

Can you match the cellular organelles to their function?

The semi-fluid stuff that is found within any cell. Contains dissolved salts. What is this called?

In plant cells, provides support. What is this structure called?

A cross section of part of a Golgi complex is shown below. Part of the membrane of the Golgi complex pinches off and moves away. Which of the following is a function of this process?

The table here shows four distinct types of cells with the presence or absence of particular organelles denoted by a '+' or '-'. Which cell type (I, II, III, or IV) contains all the listed organelles?

The table here shows four distinct types of cells with the presence or absence of particular organelles denoted by a '+' or '-'. Which cell type (I, II, III, or IV) lacks a nucleus?

A researcher claims that all living cells must be able to synthesize proteins in order to maintain homeostasis and perform basic functions. What statement supports the scientist's claim?

What is the control center of this animal cell?

Once proteins have been produced at the ribosomes, what two organelles work together to aid in the secretion process described above?

Plant and animal cells differ in a variety of ways. Plants have a special structure that helps them produce their own food. Within this specialized structure, the plant is working hard to convert the energy from the sun into its own sugars. What is the name of this plant structure?

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