Question

1. what was the shape of dna that scientists james watson and francis crick proposed? a. a single helix b. a sphere c. a cone d. a double helix 2. according to base - pairing rules, what would be the correct pairing for the base sequence atcggca during dna replication? a. tagcgct b. tagccgt c. uagccgu d. atcggca 3. unlike dna, rna contains the base: a. adenine b. cytosine c. guanine d. uracil 4. what is the process that copies a sequence of dna to produce a complimentary strand of mrna? a. replication b. regeneration c. transcription d. translation 5. what is the process that converts an mrna message into a protein? a. replication b. regeneration c. transcription d. translation

Explanation:

1. Watson and Crick proposed DNA has a double - helix structure.
2. In DNA replication, A pairs with T, and C pairs with G. So ATCGGCA pairs with TAGCCGT.
3. DNA has bases A, T, C, G; RNA has A, U, C, G instead of T with Uracil.
4. Transcription is the process of copying DNA to produce mRNA.
5. Translation is the process of converting an mRNA message into a protein.

Answer:

1. D. A double helix
2. B. TAGCCGT
3. D. Uracil
4. C. Transcription
5. D. Translation