Question

what statement best describes the process shown at step 1?
a new rrna strand is replicated during translation
a new mrna strand is produced during transcription
a complementary dna strand is produced during replication
a new set of amino acids are coded for by trna during protein formation

Explanation:

Para determinar el proceso en el paso 1, analizamos la imagen: la secuencia superior es ADN (con T) y la inferior es ARN (con U). La transcripción es la síntesis de ARNm a partir de ADN. Analicemos las opciones:

• Opción 1: "A new rRNA strand is replicated during translation" es incorrecta, ya que la replicación no ocurre en traducción y rRNA no se replica así.
• Opción 2: "A new mRNA strand is produced during transcription" es correcta, ya que la transcripción produce ARNm (con bases U) a partir de ADN (con bases T), y en el paso 1 se ve la síntesis de ARN a partir de ADN.
• Opción 3: "A complementary DNA strand is produced during replication" es incorrecta, ya que en el paso 1 se forma ARN, no ADN.
• Opción 4: "A new set of amino acids are coded for by tRNA during protein formation" es incorrecta, ya que esto es traducción (paso 2), no paso 1.

Answer:

B. A new mRNA strand is produced during transcription