Question

For Questions 1-7, write True if the statement is true. If the statement is false, change the underlined word or words to make the statement true. 1. DNA contains the sugar ribose. 2. Messenger RNA carries copies of the instructions for making proteins from DNA to other parts of the cell. 3. RNA polymerase transfers amino acids to ribosomes. 4. The process of transcription produces a complementary strand of RNA on a DNA template. 5. The enzyme that assembles a complementary strand of RNA on a DNA template is RNA polymerase. 6. The region of DNA where the production of an RNA strand begins is called the intron 7. Exons are spliced together in forming messenger RNA.

Answer 1

Ans :

1) False.

The correct statement - RNA contains the sugar ribose.

Reason : DNA has sugar deoxyribose.

2) True.

Reason : Messenger RNA (mRNA) bears a complementary copy of deoxyribonucleotide sequence present on gene (DNA segment) to the site of protein synthesis, the ribosome present in the cytoplasm.

3) False.

The correct statement - Transfer RNA transfers amino acids to ribosomes.

Reason : RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, during the process of transcription while transfer RNAs (tRNAs) function at specific sites in the ribosome during translation, which is a process that synthesizes a protein from an mRNA molecule.

4) True.

Reason : The goal of transcription is to make a RNA copy (complementary strand) of a gene's DNA sequence. This copy is called messenger RNA (mRNA) molecule.

5) True.

Reason : RNA polymerase is the enzyme that reads out a DNA sequence and transcribes it into RNA. In other words, it is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, during the process of transcription.

6) False.

The correct statement - The region of DNA where the production of an RNA strand begins is called the promoter

Reason : Introns are a segment of a DNA or RNA molecule which does not code for proteins and interrupts the sequence of genes while a promoter is a region of DNA where transcription of a gene is initiated. Promoters are a vital component because they control the binding of RNA polymerase to DNA.

7) True.

Reason : In RNA splicing, introns(non-coding regions) are removed and exons (coding regions) are covalently joined to one another as part of generating the mature messenger RNA (mRNA).