Question

15 what is the rna sequence transcribed from the dna sequence cgatca? a cgatca b cgauca c gcuagu d gctagt

Explanation:

To determine the RNA sequence transcribed from a DNA sequence, we use the base - pairing rules for transcription. In DNA - RNA transcription, adenine (A) in DNA pairs with uracil (U) in RNA, thymine (T) in DNA pairs with adenine (A) in RNA, cytosine (C) in DNA pairs with guanine (G) in RNA, and guanine (G) in DNA pairs with cytosine (C) in RNA. Also, RNA contains uracil (U) instead of thymine (T).

Let's go through each base in the DNA sequence CGATCA:

• The first base in DNA is C. According to the base - pairing rules, C pairs with G in RNA.
• The second base in DNA is G. G pairs with C in RNA.
• The third base in DNA is A. A pairs with U in RNA.
• The fourth base in DNA is T. T pairs with A in RNA.
• The fifth base in DNA is C. C pairs with G in RNA.
• The sixth base in DNA is A. A pairs with U in RNA.

Putting these paired bases together, we get the RNA sequence CGAUCA.

Answer:

B. CGAUCA