Molecular Biology Quiz: DNA Transcription, Translation, Replication

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Molecular Biology Quiz: DNA Transcription, Translation, Replication - Quiz

Test your knowledge with this molecular biology quiz. Molecular Biology is known as the field of biology that studies the composition, structure as well as interactions of cellular molecules. Transcription is the first step of gene expression, where the messenger RNA is decoded in a ribosome to produce polypeptide, which later folds into an active protein and performs its functions in the cell. We tried to understand the structure, function, and processes of DNA and RNA in the cell. See how much you understand about it by taking this quiz.

DNA Transcription, Translation, Replication Questions and Answers

DNA and RNA are different because:

DNA is only found in the nucleus, while RNA can travel anywhere in the cell. DNA is double-stranded, while RNA is triple-stranded. DNA uses Uracil while RNA uses Thymine. DNA is made of four bases, while RNA is made of five bases. None of the above Correct Answer
E. None of the above

Explanation
DNA and RNA are different nucleic acids with distinct structures and functions, but the options provided do not accurately capture the differences between them. DNA can be found in both the nucleus and the mitochondria, RNA is typically single-stranded, RNA uses uracil while DNA uses thymine, and both DNA and RNA are made of four bases (adenine, guanine, cytosine, and either thymine in DNA or uracil in RNA).

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Using the following DNA sequence, what would be the corresponding DNA strand? ATTGCGACCGAG

UAACGCUGGCUC AUUGCGACCGAG TAACGCTGGCTC UATCGCTGGCUC None of the above are correct. Correct Answer
C. TAACGCTGGCTC

Explanation
To find the corresponding DNA strand, you can use the base-pairing rules in DNA, which specify how the individual nucleotides in one strand pair with those in the other strand. These rules are as follows:

- Adenine (A) pairs with Thymine (T).
- Thymine (T) pairs with Adenine (A).
- Cytosine (C) pairs with Guanine (G).
- Guanine (G) pairs with Cytosine (C).

In the given DNA sequence "ATTGCGACCGAG," you can find the corresponding DNA strand by applying these base-pairing rules:

- A (Adenine) in the original sequence pairs with T (Thymine) in the complementary strand.
- T (Thymine) in the original sequence pairs with A (Adenine) in the complementary strand.
- C (Cytosine) in the original sequence pairs with G (Guanine) in the complementary strand.
- G (Guanine) in the original sequence pairs with C (Cytosine) in the complementary strand.

Following these rules, you can create the complementary DNA strand by replacing each nucleotide in the original sequence with its complementary base. This results in the complementary DNA strand "TAACGCTGGCTC."