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35 Cards in this Set
- Front
- Back
Which of the following Terms correctly describes the molecule below? |
Monosaccharide and Carbohydrate |
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Which of the following substances are organic? |
I. Lipids II. Water III. Carbon Dioxide I. ONLY |
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What is a role of carbohydrates in animal cells |
as energy storage |
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Which molecule is a monosaccharide |
Ribose |
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Which of the following diagrams is the structure of ribose? |
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Which is the structure of glycerol? |
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What is the maximum number of fatty acids that can be condensed with glycerol? |
Three |
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Which of the following reactions occurs when a dipeptide is formed from amino acids? |
Condensation |
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Which diagram correctly illustrated a dipeptide? |
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Which structure represents an amino acid? |
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Which is not a primary function of protein molecules? |
Energy Storage |
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What are the components of a DNA nucleotide? |
Deoxyribose, a phosphate, and one of the bases: adenine, cytosine, guanine, or uracil |
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The diagram represents a DNA nucleotide. What could the part labelled X represnet? |
Guanine |
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What causes water to have a relatively high boiling point? |
Hydrogen bonds between water molecules |
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Which of the following features are correct for hydrogen bonding? |
I. It is involved in the cohesion of water II. It results in the thermal properties of water III. It is a bond within the water molecule I. and II ONLY |
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In the structure of DNA what binds with cytosine? |
Deoxyribose |
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What is the composition of the backbone of DNA? |
Alternating sugar and phosphate molecules |
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The drawing below shows a short section of a DNA molecule. What is labelled by I,II, and III? |
I. 5' end II. purine III. covalent bond |
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What type of bonds holds the complementary base pairs together in a double helix of DNA? |
Hydrogen bonds |
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What is a difference between the sense and antisense strands of DNA? |
The sense strand has the same base sequence as tRNA, but the antisense strands does not. |
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To which parts of the deoxyribose molecule do phosphates bind in DNA? |
III and IV |
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What is responsible for the conservation of the base sequence during DNA replication? |
Unpaired bases always attracting their complementary nucleotides |
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What is the function of DNA polymerase I? |
To remove the RNA primers and replace them with DNA |
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What is the function of helicase? |
It separates DNA strands |
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During the process of replication, which bonds in the diagram of DNA below are broken? |
4,5 |
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The diagram below shows a short section of DNA molecule before and after replication. If the nucleotides used to replicate the DNA were radioactive, which strands in the replicated molecules would be radioactive? |
I, II, III, IV |
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The diagram shows part of a molecule produced by replication of DNA. What is the significance of the shaded and then unshaded regions? |
One of the parts has been newly synthesized and the other was part of a pre-existing DNA molecule. |
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Which events take place in DNA replication? I. Formation of messenger DNA II. Unwinding of DNA double helix III. Formation of complementary strands by DNA polymerase |
II, III |
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If mRNA has a codon CAU, what is the corresponding anticodon on the tRNA molecule? |
GUA |
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In which direction is the replication fork moving and which bases would be needed to replicate the section of DNA shown? |
Left to right ; T,G,C |
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Which are the correct directions of the following processes? |
all are 5' to 3' |
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During the process of translation which of the following statements describes the relationship between nucleic acids? |
Anticodons on tRNA bind to complementary codons on mRNA |
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How would the following DNA sequence, ACGTTGCATGGCA, be transcibed? |
UGCAACGUACCGU |
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A certain gene codes for a polypeptide that is 120 amino acids long. Approximately how many nucleotides long is the mRNA that codes for this polypeptide likely to be? |
360 |
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Which stage of translation is illustrated by the diagram below? |
Translocation |