Unit 2 Exploration 1

Multiple Choice

The diagram shows the structure of an amino acid. Which type of molecule is formed from amino acids?

• lipids
  
• proteins
  
• carbohydrates
  
• nucleic acids
  

Multiple Choice

Why is it important for a protein to fold into a functional structure?

• To allow the protein to carry out its biological role

• To make the protein more colorful

• To increase the protein's size

• To make the protein dissolve in water

Multiple Choice

What determines the shape and function of a protein?

• The sequence of amino acids

• The type of ribosome that assembles the protein

• The cell that manufactures the protein

​Strucuture of Proteins Video

https://www.youtube.com/watch?v=EweuU2fEgjw

joinmyquiz.com

code: 1253 7926

​https://www.biointeractive.org/classroom-resources/bcr-abl-protein-structure-and-function

​Interactive Polypeptide:

https://www.labxchange.org/library/items/lb:LabXchange:67589a17:lx_simulation:1?fullscreen=true

Making a Protein:

https://www.labxchange.org/library/items/lb:LabXchange:83c3f54d:lx_simulation:1

Multiple Select

Which of the following statements about proteins in eukaryotic cells is/are correct?

• DNA in the nucleus codes for protein formation.

• Proteins regulate cell structure and function.

• All proteins are produced in the nucleus.

• Proteins are involved in cell regulation.

Multiple Choice

Directs all cell activities through the DNA located there.

• Lysosomes
• Nucleus
• ribosomes
• Mitochondria

Multiple Choice

What biomolecule do enzymes belong to? 

• Carbohydrate
• Lipid
• Nucleic Acid
• Protein

Multiple Choice

I make proteins for the cell. What am I?

• ribosome
• mitochondria
• chloroplast
• lysosome

Fill in the Blanks

The DNA within the

carries the instructions for the cell's structure and function.

Multiple Choice

Which protein is produced and released by beta cells in the pancreas?

• Insulin

• Collagen

• Hemoglobin

• Keratin

Multiple Choice

Which type of specialized body cell is responsible for producing antibodies that protect the body against diseases?

• B lymphocytes

• Red blood cells

• Platelets

• Neurons

Multiple Choice

The diagram shows the mechanisms that control the concentration of glucose in the blood.

Which row identifies the glands and hormones labelled W, X, Y and Z?

• adrenal gland, adrenaline, adrenal gland, glucagon

• adrenal gland, adrenaline, pancreas, insulin

• pancreas, glucagon, adrenal gland, insulin

• pancreas, insulin, pancreas, glucagon

Multiple Choice

Which of the following are examples of proteins involved in internal defense and movement?

• Immunoglobulin A and Actin

• Hemoglobin and Collagen

• Estrogen and Amylase

• Myosin and Estrogen

Open Ended

Explain how proteins perform different functions in the body, giving examples for each function.

​Role of Protein:
https://www.labxchange.org/library/pathway/lx-pathway:087f7cb8-09cf-406e-bc60-5193fee3512e/items/lb:LabXchange:56181bd4:lx_simulation:1/51281

Kinds of Proteins:

https://www.labxchange.org/library/items/lb:LabXchange:dc0a027b:lx_simulation:1

Therapeutic Proteins:

https://www.labxchange.org/library/items/lb:LabXchange:70565b82:lx_simulation:1?fullscreen=true

Fill in the Blanks

Enzymes are biological

that catalyze chemical reactions in living organisms.

Multiple Choice

What is another name for enzymes?

• chemical catalysts
• microorganisms
• biological catalysts
• inorganic catalysts

Fill in the Blanks

Enzymes are a type of ______. Proteins are made up of _____ acids. Because ______ make protein, and that ______ are proteins, you can say that Ribosomes also make Enzymes.

Multiple Choice

What happens to an enzyme when it denatures?

• The activation energy of the reaction is doubled.

• The activation energy of the reaction is lowered.

• It's optimal conditions for temperature of the enzyme are doubled.

• The shape of the enzyme molecule is changed.

Multiple Choice

Where do substrates bind on an enzyme?

• voltage-gated channels
• surface receptor
• calcium channels
• active site

Multiple Choice

With what 3 letters do enzymes typically end?

• -ose
• -ase
• -ese
• -tic

Multiple Choice

Which of these is most likely an enzyme?  

• Sucrose
• Galactose
• Fructose
• Amylase

Open Ended

What is the role of the active site in enzyme function, and how can changes in temperature or pH affect it?

Multiple Choice

Which model best explains the flexible nature of enzyme activity?

• Induced fit model

• Lock and key model

• Substrate inhibition model

• Competitive inhibition model

​Amoeba Sisters: Enzymes

https://www.youtube.com/watch?v=qgVFkRn8f10

Amoeba Sisters: Enzyme Examples

https://www.youtube.com/watch?v=6EDBlowVST0

​Additional enzymes video
https://www.youtube.com/watch?v=ok9esggzN18&t=215s


Another one:
https://www.youtube.com/watch?v=ozdO1mLXBQE

​Effect of temp on protein:
https://www.labxchange.org/library/items/lb:LabXchange:99c39c9f:lx_simulation:1

Multiple Choice

Which of the following conditions can cause enzyme denaturation?

• Extremely high temperature

• Optimal temperature

• Neutral pH

• Low substrate concentration

Open Ended

Explain how enzyme concentration and substrate concentration affect the rate of enzyme-catalyzed reactions, referring to the graphs shown.

Multiple Choice

Based on the graph, what is the optimal temperature for this enzyme? 

• 15^oC
• 40^oC
• 30^oC
• 35^oC

Multiple Choice

Which of the following conclusions can be drawn from this graph?

• The optimum pH of the enzyme is 6.6.
  
• The optimum pH of the enzyme is 5.8
  
• The enzyme’s activity increases as pH increases 5.0 to 9.0
  
• The enzyme’s activity is greater around pH of 8.0 .
  

Multiple Select

Which 2 factors can affect the rate of enzyme activity?

• Light intensity

• Temperature

• pH

• Oxygen concentration

​Lab X Simulation:

https://www.labxchange.org/library/items/lb:LabXchange:54eb1b5f:lx_simulation:1

https://www.labxchange.org/library/items/lb:LabXchange:99c39c9f:lx_simulation:1

Multiple Select

Which of the following statements about salivary amylase is/are correct?

• It breaks down starch into sugars.

• It works best at pH 7.0.

• It can be tracked using the iodine test.

• It catalyzes the hydrolysis of urea.

Fill in the Blanks

What is the aim of the experiment investigating catalase activity in mung beans?

Multiple Choice

Which enzyme do germinating seeds produce to break down hydrogen peroxide, and what are the products of this reaction?

• Catalase; water and oxygen

• Amylase; glucose and oxygen

• Lipase; water and carbon dioxide

• Protease; water and nitrogen

Open Ended

Explain how the experimental setup shown in the second image allows scientists to measure catalase activity in germinating mung bean seeds.

​Catalase Reaction:

https://www.youtube.com/watch?v=VbEH25wT39E

Seed Germination Gizmo