Trivia Questions Over Macromolecules
You may take the quiz up to twice
- 1.
Polymers of polysaccharides, fats and proteins are all synthesized from monomers by
- A.
Connecting monosaccharides together
- B.
The addition of water to each monomer
- C.
The removal of water
- D.
Ionic bonding of monomers
- E.
The formation of disulfide bridges between monomers
Correct Answer
C. The removal of waterExplanation
Polymers of polysaccharides, fats, and proteins are synthesized through a process called dehydration synthesis or condensation reaction. This process involves the removal of water molecules as monomers are joined together to form a polymer. Each time a monomer is added, a water molecule is eliminated, allowing the monomers to bond together and form a larger molecule. This process is crucial for building complex macromolecules from simpler subunits and is a fundamental mechanism in the synthesis of biological polymers.Rate this question:
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- 2.
Carbohydrates normally function in animals as
- A.
The functional units of lipids
- B.
Enzymes int he regulation of metabolic processes
- C.
A component of triglycerides
- D.
Energy storage moleucules
- E.
Sites of protein synthesis
Correct Answer
D. Energy storage moleuculesExplanation
Carbohydrates are molecules that serve as a primary source of energy in animals. They are broken down into glucose, which is then used by cells to produce ATP, the main energy currency of the body. Carbohydrates are stored in the form of glycogen in the liver and muscles, and can be readily accessed when energy is needed. Therefore, carbohydrates function as energy storage molecules in animals.Rate this question:
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- 3.
Which of the following is true of saturated fatty acids?
- A.
They are the most common fatty acid in corn oil
- B.
They have double bonds between the carbon atoms of the fatty acids
- C.
They have a higher ratio of hydrogen to carbon than unsaturated fatty acids
- D.
They are usually liquids at room temperature
- E.
They are usually produced by plants
Correct Answer
C. They have a higher ratio of hydrogen to carbon than unsaturated fatty acidsExplanation
Saturated fatty acids have a higher ratio of hydrogen to carbon than unsaturated fatty acids. This means that saturated fatty acids have more hydrogen atoms bonded to the carbon atoms in their structure compared to unsaturated fatty acids. In saturated fatty acids, all carbon atoms are bonded to the maximum number of hydrogen atoms, resulting in a saturated structure. This is in contrast to unsaturated fatty acids, which have one or more double bonds between carbon atoms, resulting in a lower ratio of hydrogen to carbon.Rate this question:
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- 4.
Which type of phospholipid is most important in biological membranes?
- A.
Fat
- B.
Wax
- C.
Phospholipid
- D.
Oil
- E.
Triglyceride
Correct Answer
C. pHospHolipidExplanation
Phospholipids are the most important type of lipid in biological membranes. They have a hydrophilic (water-loving) head and hydrophobic (water-hating) tails, which allows them to form a bilayer structure in water-based environments. This arrangement forms the basis of cell membranes, providing a barrier that separates the cell from its surroundings and controls the movement of molecules in and out of the cell. Phospholipids also play a role in cell signaling and can form specialized structures such as micelles and liposomes.Rate this question:
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- 5.
The 20 different amino acids have different chemical properties because of different
- A.
Carboxyl groups
- B.
Amino groups
- C.
Side chain (R groups)
- D.
Tertiary structure
- E.
Both A and B are correct
Correct Answer
C. Side chain (R groups)Explanation
The 20 different amino acids have different chemical properties because of their side chain (R groups). The side chain is a unique component of each amino acid that determines its specific chemical properties, such as polarity, charge, and hydrophobicity. These differences in the side chain contribute to the diversity of amino acids and their ability to form various types of chemical bonds and interact with other molecules in biological systems.Rate this question:
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- 6.
A change in a protein's three dimensional shape due to disruption of hydrogen bonds, disulfide bridges and/or ionic bonds is called
- A.
Hydrolysis
- B.
Stabilization
- C.
Destabilization
- D.
Renaturation
- E.
Denaturation
Correct Answer
E. DenaturationExplanation
Denaturation refers to the change in a protein's three-dimensional shape caused by the disruption of hydrogen bonds, disulfide bridges, and/or ionic bonds. This disruption leads to the loss of the protein's native structure and function. Hydrolysis refers to the breaking down of a chemical compound with water, stabilization refers to the process of making something more stable, destabilization refers to the process of making something less stable, and renaturation refers to the process of restoring a denatured protein back to its native structure.Rate this question:
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- 7.
The major function of RNA is to
- A.
Transmit genetic information to offspring
- B.
Function in the synthesis of proteins
- C.
Make a copy of itself
- D.
Act as a pattern to form DNA
- E.
Form the genes of an organism
Correct Answer
B. Function in the synthesis of proteinsExplanation
RNA plays a crucial role in protein synthesis. It carries the genetic information from DNA to the ribosomes, where proteins are assembled. RNA acts as a template for protein synthesis by providing the sequence of amino acids that make up a specific protein. This process involves transcription, where RNA is synthesized from DNA, and translation, where the information carried by RNA is used to build proteins. Therefore, the major function of RNA is to function in the synthesis of proteins.Rate this question:
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- 8.
Which of the following best describes a nucleotide?
- A.
A nitrogen base with a phosphate group
- B.
A nitrogen base and a five carbon sugar
- C.
A nitrogen base, a phosphate group and a five carbon sugar
- D.
A five carbon sugar and adenine or uracil
- E.
A five carbon sugar and pyrine or pyrimidine
Correct Answer
C. A nitrogen base, a pHospHate group and a five carbon sugarExplanation
A nucleotide is composed of three components: a nitrogen base, a phosphate group, and a five carbon sugar. The nitrogen base can be adenine, guanine, cytosine, or thymine in DNA or adenine, guanine, cytosine, or uracil in RNA. The phosphate group is a phosphorus atom bonded to four oxygen atoms. The five carbon sugar is either ribose in RNA or deoxyribose in DNA. Therefore, the correct answer is a nitrogen base, a phosphate group, and a five carbon sugar.Rate this question:
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- 9.
The difference between the sugar in DNA and the sugar in RNA is that the sugar in DNA
- A.
Contains less oxygen
- B.
Contains adenine
- C.
Has a six carbon ring and nitrogen atoms
- D.
Can attach to phosphate unlike RNA
- E.
Is a six carbon sugar, where RNA is a five carbon
Correct Answer
A. Contains less oxygenExplanation
The sugar in DNA contains less oxygen compared to the sugar in RNA. This is because the sugar in DNA, deoxyribose, has one less oxygen atom in its structure compared to the sugar in RNA, ribose. Deoxyribose has a total of four oxygen atoms, while ribose has five oxygen atoms. This difference in oxygen content is one of the key distinctions between the two types of sugar molecules found in DNA and RNA.Rate this question:
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- 10.
In a double helix structure of nucleic acids, cytosine forms a hydrogen bond with
- A.
Deoxyribose
- B.
Ribose
- C.
Adenine
- D.
Thymine
- E.
Guanine
Correct Answer
E. GuanineExplanation
In a double helix structure of nucleic acids, cytosine forms a hydrogen bond with guanine. This is because cytosine and guanine are complementary base pairs in DNA. The hydrogen bond between cytosine and guanine helps to stabilize the double helix structure of DNA and ensures proper replication and transcription of genetic information.Rate this question:
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- 11.
Upon surveying the chemical structure of a polypeptide, you recognize a SH group. What type protein structure are you viewing?
- A.
Primary
- B.
Secondary
- C.
Tertiary
- D.
Quaternary
Correct Answer
C. TertiaryExplanation
The presence of a SH group indicates the presence of a disulfide bond, which is a covalent bond formed between two cysteine residues in a polypeptide chain. Disulfide bonds contribute to the overall folding and stability of a protein, making them a characteristic feature of the tertiary structure. Therefore, when recognizing a SH group in a polypeptide, you are viewing the tertiary protein structure.Rate this question:
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- 12.
What type of bonds are found in carbohydrates?
- A.
Peptide linkages
- B.
Ester linkages
- C.
Glycosidic linkages
- D.
Phosphodiester linkages
Correct Answer
C. Glycosidic linkagesExplanation
Glycosidic linkages are the type of bonds found in carbohydrates. These linkages occur between the hydroxyl group of one sugar molecule and the anomeric carbon of another sugar molecule. They are formed through a dehydration reaction, resulting in the formation of a glycosidic bond. This bond is responsible for connecting the monosaccharide units together, forming larger carbohydrate molecules such as disaccharides and polysaccharides. Glycosidic linkages play a crucial role in the structure and function of carbohydrates, allowing them to serve as energy sources, structural components, and cell recognition molecules.Rate this question:
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Oct 08, 2024Quiz Edited by
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Aug 12, 2014Quiz Created by
Stacey_rader
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