All AP Biology Resources
Example Questions
Example Question #61 : Biochemical Concepts
Which of the following is a monosaccharide?
Glucose
Sucrose
Starch
Maltose
Glucose
Glucose is a monosaccharide, consisting of one 6-carbon ring. Sucrose and maltose are disaccharides, and starch is a polysaccharide chain of glucose units.
Example Question #31 : Understanding Carbohydrates
The polymer chitin is made up of what carbohydrate momoner?
Fructose
N-Acetylglucosamine
Glucopyranose
N-Acetylneuraminic acid
Glucose
N-Acetylglucosamine
Chitin is a polymer that makes up the cell wall of fungal cells as well as the exoskeleton of arthropods. It itself is made up of N-Acetylglucosamine
Example Question #31 : Understanding Carbohydrates
Which of the following is a polysaccharide stored in plants?
lipids
glucose
starch
glycogen
starch
Starch is a polysaccharide stored in plants. Glycogen is a polymer of glucose in animals stored in the liver and muscle cells. Lipids are molecules made mostly of carbon and hydrogen that store energy.
Example Question #61 : Biochemical Concepts
Which of the following is a monosaccharide?
Maltose
Fructose
Sucrose
Lactase
Lactose
Fructose
Sucrose is made up of a glucose molecule and a fructose molecule. Knowing this gives a hint to the correct answer. Maltose is made up of two glucose molecules. Many glucose molecules joined together make up starch. Lactose is the sugar found in milk, and is made up on a glucose and a galactose molecule. Thus, all of the other sugars listed are disaccharides. Lactase is an enzyme, as shown by the "-ase" ending.
Example Question #63 : Biochemical Concepts
Monomers of sugars form disaccharides and polysaccharides via what type of bonding?
Glycosidic linkage
Phosphodiester bond
Hydrogen bond
Ester linkage
Peptide bond
Glycosidic linkage
A phosphodiester bond occurs in DNA and RNA between nucleotides to form nucleic acids. Ester linkage occurs in fats and lipids between a carboxyl group and the carbon chain. A peptide bond occurs between two amino acids to form a peptide bond. Hydrogen bonding is the interaction of a hydrogen of one molecule with either a oxygen, nitrogen, or fluorine of another molecule.
Example Question #64 : Biochemical Concepts
A maltose molecule can be broken down into two molecules of glucose via what reaction?
Hydrolysis
Condensation
Dehydration
Polymerization
Hydration
Hydrolysis
Maltose is a disaccharide and glucose is a monosaccharide so the question is asking what will break the disaccharide into its respected monosaccharide. Hydrolysis is the addition of a water molecule to break the glycosidic linkage of a sugar. Dehydration reaction is a type of condensation reaction that will ultimately join two monosaccharides together via the removal of a water molecule. Polymerization is a general term with regards of monomers forming polymers through a reaction. Hydration reactions are the addition of a water molecule but do not necessarily break any bonds but are used form an alcohol.
Example Question #1 : Cellular Biology
Which of the following cellular structures is not seen in both prokaryotes and eukaryotes?
Ribosomes
A cell wall
Mitochondria
DNA
Mitochondria
Prokaryotes do have organelles, but not complex, membrane-bound organelles. As a result, the membrane-bound mitochondria would not be seen in prokaryotes. Remember that plants are eukaryotes, and have cell walls just like prokaryotes. In addition, prokaryotes have ribosomes as well as DNA.
Example Question #2 : Cellular Biology
Prokaryotes, but not eukaryotes, lack which of the following structures?
Mitochondria
Flagella
Ribosomes
DNA
Mitochondria
Prokaryotes do not have membrane-bound organelles, such as mitochondria or an endoplasmic reticulum.
Flagella are hair-like structures that allow the cell to move, and are present in both prokaryotes and eukaryotes. Although prokaryotes don't have multiple chromosomes like eukaryotes, they do still have DNA in the form of a cyclic chromosome. Ribosomes are not bound by a membrane, and are essential to the process of translation, which creates proteins in the cell. Prokaryotes and eukaryotes possess ribosomes in order to form functional proteins.
Example Question #1 : Understanding Eukaryotic And Prokaryotic Differences
Where does the electron transport chain occur in prokaryotic cells and eukaryotic cells, respectively?
The chloroplasts; the cellular membrane
The mitochondria; the cellular membrane
The mitochondria; the mitochondria
The cellular membrane; the mitochondria
The chloroplasts; the mitochondria
The cellular membrane; the mitochondria
Prokaryotes, such as bacteria, do not contain membrane-bound organelles such as the nucleus, mitochondria, and chloroplasts that we might find in a eukaryotic cell. Since we know the electron transport chain (ETC) is important in providing cellular energy, prokaryotes must still perform some form of this process. The complexes of the ETC are found in the actual cellular membrane that separates the cell from the environment in prokaryotes, while they are found in the inner mitochondrial membrane in eukaryotes. Eukaryotes are then able to generate a proton gradient between the two mitochondrial membranes within the intermembrane space, while prokaryotes can generate a gradient between the cell membrane and cell wall.
Example Question #1 : Understanding Eukaryotic And Prokaryotic Differences
Prokaryotes and eukaryotes are defined by a series of differences. Which of the following structures is found in one class of cell, but not the other?
Cell wall
Plasma membrane
Mitochondria
Ribosomes
Mitochondria
Prokaryotes do not have membrane-bound organelles, so they would not have mitochondria.
Cell walls and plasma membranes are found in both bacteria (prokaryotes) and plants (eukaryotes). Ribosomes are not bound by a membrane, and are mainly composed of rRNA; they are used for protein synthesis in both prokaryotes and eukaryotes.
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