What does it mean for a protein to be denatured?

the protein changes its shape, making it unable to do its job

the protein is removed from its original environment

the protein is modified to make it a better structure

the protein speeds up the chemical reaction

Students in a science class were asked to investigate how missing or damaged organelles affect cellular homeostasis. Which of the following questions should they ask if they are investigating the importance of the ribosome? (Hint: Think about what ribosomes make.)

Which organelle would most likely be affected if there were no g present amino acids for building proteins in the cell?

Which organelle would most likely be affected if there was no glucose present to convert energy for cellular needs?

Which organelle would most likely be affected if there were no enzymes present to digest old and damaged parts in the cell?

Which organelle would be most likely be affected if there was no sunlight available to convert solar energy into chemical energy?

What does it mean for a protein to be denatured?

To cause the structure of a protein to unfold and to change shape, making it unable to do its job.

The protein is removed from its original environment and placed into a different, more suitable environment.

To modify the protein to make it a better structure.

To make a protein speed up the chemical reaction.

The graph above how the activity of an enzyme changes over a range of pH values. Which of the following conclusions is supported by the data?

The optimum pH of the enzyme is 2.0

The optimum pH of the enzyme is 1.0

The enzyme's activity is greater around pH of 4 than around pH of 1

The enzyme's activity continually increases as pH increases from 1.0 to 6.0

Plant species such as the sesame plant and the coconut palm have large amounts of lipids in their seeds. Which of the following is the most likely function of these lipids?

to store energy for the seedlings

to absorb water for the seedlings

to encode most of the genetic information in the seedlings

to speed up most of the chemical reactions in the seedlings

Which of the following will most likely change when an enzyme is added to a reaction?

the temperature of the reaction

Which of the following is the best explanation of how one organelle in a cell directly supports the work of another organelle to maintain cellular homeostasis within a plant cell?

Chloroplasts convert solar energy into simple sugars which are often then used by the mitochondria to provide energy for the cell

Chloroplasts and the mitochondria benefit from breaking down proteins for immediate energy

Mitochondria produce energy molecules which are digested by the lysosomes to provide energy for the cell

Golgi bodies sort, refine, and repackage lipids used by the smoother ER when making proteins

How does an enzyme influence a biological reaction?

it decreases the activation energy needed for chemical reactions

it increases the net energy difference between products

it increases in kinetic energy of reactants by increasing their collision

it decreases the kinetic energy of the reactants, enabling them to change

The graph above show how the activity of an enzyme changes over a range of pH values. Which of the following conclusions is supported by the data?

The optimum pH of the enzyme is 8.0

The optimum pH of the enzyme is 6.0

The enzyme's activity is greater around 10.0 than is iat 7.0

The enzyme's activity continually increases as pH increases from 6 to 10.

Review the diagram of the cell. Which of the following is NOT an explanation of cell structures and organelles working together to maintain homeostasis in this cell?

The chloroplast and nucleus work together to make proteins convert into immediate energy for the cell.

The chloroplast and mitochondria work together to provide food and energy for the cell.

The cell wall and central vacuole work together to provide structure and support for the cell.

The endoplasmic reticulum and Golgi body work together to produce, package, and transport proteins.

Bio- Unit 1 Test Review (Macromolecules & Cell Structures)

Authored by Susan Loibl

Biology

9th - 10th Grade

NGSS covered

Used 61+ times

Bio- Unit 1 Test Review (Macromolecules & Cell Structures)

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The building blocks of proteins

amino acids

sugars

fatty acids

nucleotids

Tags

NGSS.HS-LS1-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Store and communicate genetic information

carbohydrates

lipids

proteins

nucleic acids

Tags

NGSS.HS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Helps to speed up chemical reactions

carbohydrate

sugar

DNA

enzyme

Tags

NGSS.HS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When enzymes get too hot or too cold they lose their shape and become inactive. What is this called?

debonding

deforming

denaturing

homeostasis

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Basic building blocks of DNA

amino acids

glucose

fatty acids

nucleotides

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Carbohydrates are used by living thins as a source of this.

raw materials for building cells

hormone balance

insulation

quick energy

Tags

NGSS.HS-LS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Organelle that cleans and recycles the cell, digesting molecules into particles the cell can use.

Golgi apparatus

mitochondria

endoplasmic reticulum

lysosome

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Bio- Unit 1 Test Review (Macromolecules & Cell Structures)

The building blocks of proteins

Store and communicate genetic information

Helps to speed up chemical reactions

When enzymes get too hot or too cold they lose their shape and become inactive. What is this called?

Basic building blocks of DNA

Carbohydrates are used by living thins as a source of this.

Organelle that cleans and recycles the cell, digesting molecules into particles the cell can use.

Organelle that makes proteins using coded instructions that come from the nucleus

What does it mean for a protein to be denatured?

Which of the following organelles is found ONLY in PLANT cells?

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