20895734
Descripción
Test por Blen Abate, actualizado hace más de 1 año
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Creado por Blen Abate
hace casi 5 años
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Pregunta 1
Pregunta
What are the components of a DNA molecule?
Respuesta
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deoxyribose, a phosphate and one of the bases: adenine, cytosine, guanine or thymine
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ribose, a phosphate, and one of the bases: adenine, cytosine, guanine or uracil
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Deoxyribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymine
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Ribose, a nitrate and one of the bases: adenine, cytosine, guanine or thymine
Pregunta 2
Pregunta
What type of bond holds the complementary base pairs together in a double helix of DNA?
Respuesta
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Covalent bonds
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Peptide bonds
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Glycosidic bonds
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Hydrogen bonds
Pregunta 3
Pregunta
What enzyme is used in transcription but not in translation?
Respuesta
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DNA polymerase
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Helicase
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Protease
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RNA polymerase
Pregunta 4
Pregunta
A certain gene in a bacterium codes for a polypeptide that is 120 amino acids long. How many nucleotides are needed in the mRNA to code for this polypeptide?
Respuesta
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30
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40
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360
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480
Pregunta 5
Pregunta
What is responsible for the conservation of the base sequence during DNA replication?
Respuesta
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DNA polymerase working on one strand at the same time.
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Unpaired bases always attracting their complementary nucleotides.
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DNA helicase and polymerase are complementary.
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Both strands are identical to each other.
Pregunta 6
Pregunta
During the process of replication, which bond(s) in the diagram of DNA below is/are broken?
Respuesta
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3
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4/5
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1,2,6,7
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1,7,4,5
Pregunta 7
Pregunta
How would the following DNA sequence, ACGTTGCATGGCA, be transcribed?
Respuesta
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UGCAACGUACCGU
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TGCAACGTACCGT
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ACGTTGCATGGCA
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ACGUUGCAUGGCA
Pregunta 8
Pregunta
The base sequence is the store of information.
Respuesta
- True
- False
Pregunta 9
Pregunta
Nitrogenous bases have two rings.
Respuesta
- True
- False
Pregunta 10
Pregunta
The base-phosphate backbone ensures that the store is stable and secure.
Respuesta
- True
- False
Pregunta 11
Pregunta
In order to link nucleotides into a chain, a hydrogen bond is formed b/n the phosphate and a pentose sugar.
Respuesta
- True
- False
Pregunta 12
Pregunta
Polymers of nucleotides also known as "strands"
Respuesta
- True
- False
Pregunta 13
Pregunta
The four bases in RNA are [blank_start]adenine[blank_end], [blank_start]uracil[blank_end], [blank_start]cytosine[blank_end] and [blank_start]guanine[blank_end].
Respuesta
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uracil
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adenine
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cytosine
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guanine
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