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WorksheetsBiochemistry pt2 Quiz
Total questions: 47
Worksheet time: 24mins
Which of the following is the building block of carbohydrates?
Disaccharides
Polysaccharides
Monosaccharides
Oligosaccharides
What is the major storage form of glucose in animals?
Starch
Glycogen
Cellulose
Lactose
Glycolysis occurs in which part of the cell?
Mitochondria
Cytoplasm
Nucleus
Ribosome
During glycolysis, what is the net ATP gain from one glucose molecule?
4 ATP
6 ATP
2 ATP
8 ATP
Which of the following regulates glycolysis by inhibiting its key enzymes?
Insulin
ATP
Epinephrine
Glucagon
What is the primary function of gluconeogenesis?
Break down glycogen
Form glucose from non-carbohydrate sources
Convert glucose to pyruvate
Store glucose as glycogen
What is the role of the Cori cycle?
Transport glucose to the brain
Recycle lactate into glucose
Synthesize glycogen
Convert ATP to ADP
Glycogenolysis is activated by which of the following hormones?
Insulin
Glucagon
Estrogen
Thyroxine
During fasting, what process supplies glucose to maintain blood glucose levels?
Glycolysis
Gluconeogenesis
Fermentation
Ketogenesis
Which enzyme is primarily responsible for glycogen synthesis?
Hexokinase
Glycogen synthase
Phosphofructokinase
Pyruvate kinase
Which of the following lipids serves as a precursor for steroid hormones?
Cholesterol
Phospholipids
Sphingolipids
Triacylglycerols
Lipase enzymes are responsible for breaking down:
Cholesterol
Triacylglycerols
Lipoproteins
Phospholipids
Which lipoprotein is known as “bad cholesterol” due to its role in delivering cholesterol to tissues?
HDL
LDL
VLDL
Chylomicrons
The process of lipolysis involves:
Synthesis of fatty acids
Storage of triacylglycerols
Breakdown of stored triacylglycerols
Conversion of glucose to glycogen
Which molecule regulates the entry of fatty acids into mitochondria during β-oxidation?
Coenzyme A
Carnitine
ATP
FADH2
Fatty acid synthesis and β-oxidation differ in:
Enzymes involved
Cellular location
Direction of the pathway
All of the above
Triacylglycerols are stored in which type of cells?
Hepatocytes
Adipocytes
Myocytes
Neurons
Which coenzymes are produced during β-oxidation and used in the electron transport chain?
ATP and NADPH
NADH and FADH2
Acetyl-CoA and NADH
GTP and Coenzyme Q
What is the main metabolic fate of acetyl-CoA during lipid catabolism?
Converted into glucose
Enter the citric acid cycle
Stored as glycogen
Used to form ATP directly
Which of the following processes is stimulated by insulin after a meal?
β-oxidation
Lipolysis
Fatty acid synthesis
Ketogenesis
Polysaccharides differ based on which of the following features?
Identity of recurring monosaccharides
Length of chains
Degree of branching
All of the above
Which type of polysaccharide serves as a structural component in plants?
Starch
Glycogen
Cellulose
Hyaluronic acid
What happens to blood glucose levels immediately after a meal?
They decrease due to insulin secretion
They remain constant
They increase, triggering insulin release
They decrease due to glucagon release
In which organ does gluconeogenesis predominantly occur?
Pancreas
Liver
Brain
Kidney
The final product of glycolysis is:
Lactate
Glucose
Pyruvate
Acetyl-CoA
Which process is responsible for maintaining blood glucose levels during exercise?
Glycogenolysis
Glycolysis
Gluconeogenesis
All of the above
The process of converting glucose into glycogen is called:
Glycogenolysis
Glycogenesis
Gluconeogenesis
Fermentation
Which molecule acts as an allosteric activator of glycolysis during stress?
Insulin
ATP
Epinephrine
Glucagon
The enzyme glucose-6-phosphatase is involved in which process?
Glycolysis
Gluconeogenesis
Glycogenolysis
Pentose phosphate pathway
What happens to glycogen metabolism in the liver during fasting?
Glycogen synthesis is activated
Glycogen breakdown is activated
Gluconeogenesis is inhibited
Glycolysis is stimulated
Glycogen breakdown is activated?
Glycogen synthesis is activated
Glycogen breakdown is activated
Gluconeogenesis is inhibited
Glycolysis is stimulated
Fatty acids are classified into which two main categories based on hydrocarbon chains?
Amphipathic and Non-amphipathic
Linear and Branched
Saturated and Unsaturated
Hydrophilic and Hydrophobic
Which molecule is the precursor for the synthesis of bile acids?
Phospholipids
Triacylglycerols
Cholesterol
Fatty acids
What is the primary source of lipids for the body?
De novo synthesis
Dietary intake
Fatty acid oxidation
Protein metabolism
Which of the following is an example of a complex lipid?
Fatty acids
Cholesterol
Phospholipids
Waxes
How many ATP molecules are generated approximately from the complete oxidation of one fatty acid molecule?
36 ATP
76 ATP
130 ATP
180 ATP
In lipid digestion, lipases convert triacylglycerols into which products?
Cholesterol and glycerol
Fatty acids and monoacylglycerols
Glucose and fatty acids
Chylomicrons and bile acids
What is the function of chylomicrons?
Transport cholesterol from tissues to the liver
Carry dietary lipids from the intestine to tissues
Deliver triglycerides from the liver to adipose tissue
Synthesize fatty acids in the liver
Which process breaks down stored lipids in adipocytes into free fatty acids and glycerol?
β-oxidation
Lipogenesis
Lipolysis
Fatty acid synthesis
What is the primary regulatory hormone involved in stimulating fatty acid synthesis?
Glucagon
Insulin
Epinephrine
Cortisol
Which of the following is a structural lipid found in cell membranes?
Triacylglycerols
Fatty acids
Phospholipids
Waxes
What happens to acetyl-CoA produced in β-oxidation under fasting conditions?
It is converted into fatty acids
It enters the citric acid cycle
It is used for glycogen synthesis
It remains stored in the cytoplasm
Which molecule activates hormone-sensitive lipase during lipolysis?
Insulin
Glucose
Epinephrine
ATP
What happens to lipoproteins like VLDL after triglycerides are removed?
They are excreted by the kidneys
They are converted to LDL
They form HDL
They are reabsorbed into the liver
How are activated fatty acids transported into mitochondria for β-oxidation?
By forming triacylglycerols
Using the carnitine shuttle
Via chylomicrons
By direct diffusion
What is the primary role of high-density lipoprotein (HDL)?
Transport dietary lipids
Deliver triglycerides to tissues
Reverse cholesterol transport to the liver
Emulsify dietary fats
Which enzyme catalyzes the first step in fatty acid synthesis?
Hormone-sensitive lipase
Lipoprotein lipase
Acetyl-CoA carboxylase
Fatty acid synthase
