19067717
Descripción
Test por Vivienne Milton, actualizado hace más de 1 año
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Creado por Vivienne Milton
hace más de 5 años
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Pregunta 1
Pregunta
What is responsible for unwinding the DNA and building the mRNA strand?
Respuesta
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ribosomes
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enzymes
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tRNA
Pregunta 2
Pregunta
What must happen to the mRNA strand before it leaves the nucleus?
Respuesta
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It must be replicated
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It must be translated
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It must be edited
Pregunta 3
Pregunta
Some important differences between DNA and RNA:
Firstly that [blank_start]DNA[blank_end] is double-stranded, while [blank_start]RNA[blank_end] is a single-strand.
DNA has the nucleotide [blank_start]thymine[blank_end], while RNA has [blank_start]uracil[blank_end].
The [blank_start]sugar[blank_end] of DNA is deoxyribose, while the [blank_start]sugar[blank_end] of RNA is [blank_start]ribose[blank_end].
Respuesta
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DNA
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RNA
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thymine
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uracil
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sugar
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sugar
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ribose
Pregunta 4
Pregunta
Proteins are made of one or more polypeptide chains.
Respuesta
- True
- False
Pregunta 5
Pregunta
Which of the following are functions of proteins? (tick all that apply)
Respuesta
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Enzymes
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Certain hormones
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Main component of the plasma membrane
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Immune system components
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Body structures like hair and nails
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A primary energy source
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A back-up energy source
Pregunta 6
Pregunta
Polypeptide chains are made of amino acids linked together by hydrogen bonds.
Respuesta
- True
- False
Pregunta 7
Pregunta
Which of the following is correct for the steps of protein synthesis:
Respuesta
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Transcription occurs at the ribosomes; the strand of mRNA is edited; the mRNA exits the ribosomes; the mRNA is translated into a polypeptide chain in the nucleus
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Transcription occurs in the nucleus; the strand of mRNA is edited; the mRNA exits the nucleus; the mRNA is translated into a polypeptide chain at the ribosomes
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Translation occurs in the nucleus; the strand of mRNA is edited; the mRNA exits the nucleus; the mRNA is transcribed into a polypeptide chain at the ribosomes
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Translation occurs at the ribosomes; the strand of mRNA is edited; the mRNA exits the nucleus; the mRNA is transcribed into a polypeptide chain in the nucleus
Pregunta 8
Pregunta
Which type of RNA are these statements describing:
- The molecule has a distinctive folded structure with three hairpin loops that form the shape of a three-leafed clover
- This type of RNA carries amino acids to the ribosome
Respuesta
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mRNA
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tRNA
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rRNA
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