Biochem Final

A detailed illustration of the biochemistry concepts, including the Electron Transport Chain, amino acids, and metabolic pathways with academic elements like textbooks and lab equipment in the background.

Biochemistry Final Quiz

Test your knowledge of biochemistry with our comprehensive quiz designed for students and enthusiasts alike! Dive into a variety of questions covering essential topics such as metabolic pathways, enzyme functions, and amino acid properties.

Prepare for your exams and expand your understanding of:

The Electron Transport Chain
Protein Structure and Function
Metabolic Cycles and Pathways
Enzyme Kinetics

65 Questions16 MinutesCreated by ExploringMolecule27

Which is untrue about cells with tight coupling?

Oxygen use depends on metabolism

Catabolism depends on energy needs

NAD+ levels vary with exercise

Little to no proton gradient

The ETC runs when Oxidative Phosphorylation runs

What increases the rate of hydrogen ions pumping out?

An increase of ATP production

A decrease of ATP production

An increase of the chemiosmotic process

An increase of water in the inner membrane

None of the above

What functional groups are in cysteine?

What is the purpose of buffers in biological systems?

To maintain intracellular and extracellular pH within a narrow range and resist changes in pH

To maintain intracellular and extracellular pH within a narrow range

To resist changes in pH

All of the above

None of the above

What best describes transamination?

The transfer of a lipid from one molecule to another

The transfer of an amino acid to a ketoacid

The transfer of a ketone to an amino acid

The exchange of two amino groups

None of the above

What product(s) do the reaction of α-ketoacid and glutamate form?

What is the overall reaction of the Kreb’s Cycle?

What best matches the definition of Cataplerotic?

Molecules from other pathways feeding into a cycle

Conversion of biomolecules into cellular energy

Ca intermediate that can supply intermediates to other pathways

Binding of small enzymes that change in activity

Degrades oligopeptides

Which two enzymes have a positive DELTA G0’?

Aconitase and Malate Dehydrogenase

Citrate Synthase and Succinate Dehydrogenase

Succinyl-CoA Synthase and Aconitase

Malate Dehydrogenase and a-Ketoglumate Dehydrogenase

Succinate Dehydrogenase and Aconitase

What best describes perfect enzymes?

What type of enzymes often display sigmoidal plots of activity versus substrate concentration?

Out of the following, which of the following is NOT the first four steps of glycolysis?

Which two sugars are the entry point for glycolysis?

Sucrose and Fructose

Fructose and Galactose

Galactose and Sucrose

Glucose and Fructose

When glucose 6 phosphate is converted into fructose 6 phosphate, what enzyme catalysis it?

Phosphofructokinase

Aldolase

Phosphoglucoisomerase

Triosephosphate isomerase

Given the name of this fatty acid, what can you conclude? 18:1 cis-∆9

There are 18 carbons

There is one unsaturation

When naming this fatty acid, you would start at the terminal end and work towards the beginning

Both 18 C's & unsaturation

All of the above

What is the impact of adding cholesterol to a saturated fatty acid chain?

It becomes more saturated

It widens the range between solid and liquid state but has no impact on midpoint

It lessens the range between solid and liquid state and increases midpoint

Increases membrane fluidity

None of the above

What is the function of cardiolipin?

Plays a role in apoptosis

Attaches a fatty acid to an OH group

Captures Vitamin A and B

Inhibits immune responses

Both Attaches a fatty acid to an OH group & Inhibits immune responses

Lipids can cross the bilayer either laterally or transversely. For transverse movement, three enzymes are required. Name them.

Sphingolipids are lipids with a sphingosine backbone. What is their function?

Replace oxygen lost

Plays a role in apoptosis

Break down molecules to a form where they can enter the Citric Acid Cycle

Attaches a fatty acid to one of the OH groups

All of the above

Which of the following quotes was said by Dr. P’Pool during lecture?

�Let’s kick this pig”

�They don’t just hand out PhDs”

�Did you learn how to whisper in a sawmill?”

�If I hear Peppa Pig’s voice one more time, I’m not responsible for my actions”

All of the above

Which of the following best defines an enantiomer?

Why is the peptide bond planar?

Bulky side chains prevent free rotation around the bond

It exhibits partial double-bond character, preventing roation

Hydrogen bonding between the NH and C=O groups limits movement

None of the above

All of the above

Which of the following amino acid residues would most likely be buried in the interior of a water-soluble, globular protein?

Proteins are chiefly composed of which of the following?

Carbohydrate and amino acids

Long unbranched amino acid polymers

Peptide bonds formed between lipid moieties

Aggregated amino acids

Carbohydrate and amino acids and Long unbranched amino acid polymers

Carbohydrates are:

Aldehydes with 2 or more hydroxyl groups

Ketones with 2 or more hydroxyl groups

Acids with 2 or more hydroxyl groups

Alcohols with 2 or more hydroxyl groups

Both Aldehydes and Ketones with 2 or more hydroxyl groups

The notion 12:2 indicates which of the following about a fatty acid?

There are 12 carbons in the chain with two double bonds

There are two 12 carbon chains for this fatty acid

The second carbon has a fatty acid double bond

The 12th carbon has a double bond

There are two trans-double bonds on the 12 carbon fatty acid

The configuration at which carbon atom determines if a monosaccharide is D or L?

Lowest numbered chiral carbon

Highest numbered chiral carbon

Chiral carbon closest to the aldehyde or keto group

Carbon of the primary alcohol groups

What is the common strategy by which catalysis occurs?

Which of the following is true?

Enzymes force reactions to proceed in only one direction

Enzymes alter the equilibrium of the reaction

Enzymes alter the standard free energy of the reaction

All of the above

None of the above

The Gibbs free energy of activation is:

Difference between the substrate and the transition state

Difference between the substrate and product

Difference between product and transition state

All of the above

None of the above

Relationship between delta G0' and delta G is best described as:

Determined by the temp

Described by changes in Keq

Differ from standard state to physiological/actual [reactants] and [products]

Dependent on the reaction mechanism of the reaction

Differ only in terms of the types of reaction used for each value

In what type of inhibition can be the inhibitor only bind to the ES complex to form an ESI compex?

Why is glycogen branching important?

Branching significantly alters the melting point

Branching decreases the solubility of gylcogen

Branching increases the rates of glycogen synthesis and degradation by increasing the potential sites of action

Branching allows glycogen to be transported to other areas of the cell

What enzyme(s) is (are) required to synthesize a 1,4 glycosidic bonds in glycogen??

Glycogen synthase

UDP-glucose phosphorylation

Branching enzyme

The ...... Creates a 1,6 glycosidic bond in glycogen?

Branching enzyme

Glucose transferase

Glycogen isomerase

Glycogen synthase

What is the main product of the pentose phosphate pathway?

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