WorksheetsBiology Exam 2
Total questions: 36
Worksheet time: 9hrs 0mins
What are the two types of inhibition?
Competitive Inhibition
Allosteric Inhibition
Non-Competitive Inhibition
Enzyme inhibition
What is feedback inhibition?
It is when the end product of a pathway, inhibits another pathway
It is when the enzyme in pathway creates the end product
It is when the substrate binds to the enzyme’s active site
It is the process of competitive inhibition trying to compete with the substrate for access to the active site of the enzyme
What are cofactors of enzymes?
things that inhibit an enzyme
They are the other factors that affect how a enzyme works
They are the surrounding environment that affects enzymes
Things that aid enzymes in their job
What are allosteric activators?
They speed up the reaction between the substrate and the active site
They modify the active site so that the affinity for the substrate increases
They modify the active site so that the affinity for the competitive inhibitors increases
They modify the active site so that the affinity for the substrate decreases
What is competitive inhibition?
it fights for access to the active site with the inhibitor
It decreases or increases the affinity for the substrate
It binds to another part of the enzyme causing a slower reaction
It competes for access to the active site with the substrate
What is coupling
Doubling
Combining
Multiplying
Splitting
What is Delta G negative?
Spontaneous
Non-Spontaneous
Exergonic
Endergonic
What is Delta G positive?
Spontaneous
Non-Spontaneous
Exergonic
Endergonic
Where do the co-enzymes electrons go to?
Protein Synthesis
Citric Acid Cycle
Electron Transport Chain
Feedback inhibition
Where does glycolysis occur?
Cytosol
Stomach
Small intestine
Rough ER
Where does the citric acid cycle occur?
Small Intestine
Golgi Apparatus
Stomach
Mitochondria
What does the citric acid cycle produce?
NADH
FADH2
NADH2
FADH
What are enzymes?
Phospholipid
Proteins
Macromolecules
Carbohydrates
What are the parts of a phospholipid?
Glycerol molecule, head
2 fatty acid chains, tail
Carbohydrate molecule, head
2 carbohydrate chains, tail
What part of the phospholipid is non-polar & hydrophobic?
(a)
What part of the phospholipid is polar & hydrophilic?
(a)
Where are fats broken down?
Mitochondria
Stomach
Small Intestine
Cytosol
What are tight junctions?
They provide direct communication channels to animal cells
They provide direct communication channels to plant cells
Watertight seals in plant cells that prevent materials from leaking from the cell
Watertight seals in animal cells that prevent materials from leaking from the cell
Select which of the following are common components of cells
Plasma membrane
Genetic material
Ribosomes
Cytoplasm
Consider a reaction in which reactants X and Y combine to form the product Z. The diagram below compares the reaction coordinates for the catalyzed and uncatalyzed pathways of this reaction.
Which of the following about letter B is true?
Letter B represents the energy difference between the reactants & products for the uncatalyzed pathway
Letter B represents the energy difference between the reactants & products for the catalyzed pathway
Letter B represents the activation energy of the uncatalyzed reaction pathway
Letter an represents the activation energy of the catalyzed reaction pathway
Pancreatic amylase is a digestive enzyme found in the small intestine. It helps break down large starch molecules later in the digestive process. Pancreatic amylase is unable to break down lipids.
Which of the following best explains why pancreatic amylase is able to break down starches, but not lipids?
Lipids are too small to bind to enzymes
Enzymes only bind to specific substrates
Lipids are too hydrophobic to be broken down by enzymes
Enzymes denature in the presence of lipids
Methotrexate is a drug that is commonly used to treat cancers and autoimmune diseases in humans. It functions by binding to the active site of the enzyme DHFR, preventing both DNA synthesis and excess cell proliferation.
Which of the following terms best describes Methotrexate?
CoFactor
Non-competitive Inhibitor
Competitive Inhibitor
Allosteric Activator
What is endosymbiosis?
Mutually beneficial relationship where one organism lives inside another
Mutually beneficial relationship where one organism lives outside another
A relationship between organisms where neither benefit from each other
A relationship between organisms where neither gain or loss anything from each other
What organelles are products of endosymbiosis?
Ribosomes
Mitochondria
Endoplasmic reticulum
Chloroplast
What organelles are apart of the endomembrane system?
Nuclear envelope, lysosomes, vesicles, Endoplasmic reticulum, Golgi body, & plasma membrane
Nuclear envelope, mitochondria, vesicles, Endoplasmic reticulum, Golgi body, & plasma membrane
Nuclear envelope, lysosomes, proteins , Endoplasmic reticulum, Golgi body, & plasma membrane
Nuclear envelope, lysosomes, vesicles, Endoplasmic reticulum, ribosomes, & plasma membrane
What are Intracellular junctions?
(Choose the best option)
They provide communication for cells
They connect one cell to another
They provide direct channels of communication between cells
They help provide cells with what they need from other cells
Plant and Animal cells use the same intracellular junctions
True
False
What type of intracellular junctions do plants use?
Desosomes
Gap
Tight
Plasmodesmata
What type of intracellular junctions do animals use?
(Select all that apply)
Tight
Gap
Plasmodesmata
Desosomes
Which one is a Desosome?
Which one is a plasmodesmata?
Which one is a Gap Junction?
Which one is a Tight Junction?
What is the first major component of the plasma membrane?
Proteins
Glycolipids
Cholesterol
Phospholipids
What is the second major component of the plasma membrane?
Proteins
Glycoproteins
Phospholipids
Cholesterol
What is the third major component of the plasma membrane?
Proteins
Cholesterol
Phospholipids
Glycoproteins
