DNA sequences are a series of four letters: A, C, G, and T. When our body is reading these sequences, it reads them in sets of three, which are referred to as codons. Each codon tells your body to do one of three things: 1. Start reading, 2. Add a molecule to the sequence, 3. Stop reading. The START codon is ATG, and the STOP codons are either TAA, TAG, or TGA; any of those three will stop it. Every other combination of A/C/G/T will add a different molecule to the sequence. Write a function dnaRead which takes a vector of strings, each of length 3, as the parameter and returns the DNA sequence between the start and stop codons, with the following qualities: • Function Specifications: o The function name: dna Read o The function parameters in this order: ▪ vector dna: a vector of strings each of length 3, only containing A/C/G/T o The function returns a string: ■ If any vector element is not length 3 or contains a character that is none of A, C, G, or T, return "Invalid Sequence" ■ It returns the combined DNA sequence between the start and stop codons, EXCLUSIVELY. ■ If there is no start codon, it returns the empty string, "". ■ If there is no stop codon, it returns the entire remainder of the string after the start codon.
DNA sequences are a series of four letters: A, C, G, and T. When our body is reading these sequences, it reads them in sets of three, which are referred to as codons. Each codon tells your body to do one of three things: 1. Start reading, 2. Add a molecule to the sequence, 3. Stop reading. The START codon is ATG, and the STOP codons are either TAA, TAG, or TGA; any of those three will stop it. Every other combination of A/C/G/T will add a different molecule to the sequence. Write a function dnaRead which takes a vector of strings, each of length 3, as the parameter and returns the DNA sequence between the start and stop codons, with the following qualities: • Function Specifications: o The function name: dna Read o The function parameters in this order: ▪ vector dna: a vector of strings each of length 3, only containing A/C/G/T o The function returns a string: ■ If any vector element is not length 3 or contains a character that is none of A, C, G, or T, return "Invalid Sequence" ■ It returns the combined DNA sequence between the start and stop codons, EXCLUSIVELY. ■ If there is no start codon, it returns the empty string, "". ■ If there is no stop codon, it returns the entire remainder of the string after the start codon.
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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