SAT II Biology M : Macromolecules
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Example Questions
Example Question #11 : Macromolecules
The phospholipid bilayer is critically important to the separation of the internal and external environment of the cell.
What drives the formation of the phospholipid bilayer?
None of these
The external environment pushes non-polar hydrophilic fatty acid tails to form the inner layer and the polar hydrophilic head groups to form the outer layer.
The external environment pushes non-polar hydrophilic fatty acid tails to form the inner layer and the polar hydrophobic head groups to form the outer layer.
The external environment pushes non-polar hydrophobic fatty acid tails to form the inner layer and the polar hydrophilic head groups to form the outer layer.
The external environment pushes non-polar hydrophobic fatty acid tails to form the inner layer and the polar hydrophobic head groups to form the outer layer.
The external environment pushes non-polar hydrophobic fatty acid tails to form the inner layer and the polar hydrophilic head groups to form the outer layer.
The external hydrophilic environment attracts polar hydrophilic phosphate head groups to the exterior, while allowing non-polar hydrophobic fatty acids to remain shielded in the interior of what becomes the phospholipid bilayer.
Example Question #2 : Lipids
Lipids are made up of hydrocarbons linked to each other.
A hydrocarbon involves an atom of carbon with how many hydrogen atoms bonded to it?
Five
One
Four
Two
Three
Two
A hydrocarbon is made up of a carbon and two hydrogen atoms attached to it.
Example Question #1 : Lipids
Which of the following macromolecules are composed of long chains of amino acids?
Fats
Proteins
Nucleic acids
Carbohydrates
Lipids
Proteins
By process of elimination, lipids and fats cannot be the correct answer-they are synonymous (lipids are also known as fats). Carbohydrates, eg sugars and starches are composed only of carbon, hydrogen, and oxygen. Nucleic acids contribute to DNA and RNA structure and function. The correct answer is proteins, made of long chains of amino acids-amino acids are sometimes called the "building blocks" of proteins.
Example Question #11 : Molecular Biology
Nucleic acids carry the information of what your cells will do. An example of a nucleic acid would be which of the following?
Asparagine
Cellulose
Carbon
RNA
RNA
Examples of nucleic acids include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). Because DNA is not an answer choice, we know that the correct answer in this problem must be RNA. Cellulose is a carbohydrate, asparagine is an amino acid, and carbon is an element.
Example Question #1 : Nucleic Acids
Which of the following is not involved in DNA synthesis?
Cytosine
Guanine
Uracil
Thymine
Adenine
Uracil
Uracil is a base utilized in RNA synthesis, whereas adenine, cytosine, guanine, and thymine are utilized in DNA synthesis.
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