The diagram shows the structure of DNA with complementary base pairing between strands. Bood 3' CG AT ౦ార G C CG CG 3' 5 What is the benefit of this complementary nature of DNA? O It helps in controlling the amount of protein produced by the cells. O It helps in storing all the information required for the cell to function efficiently. It helps in the synthesizing of two new identical DNA strands from each parent strand O It helps in the unwinding of DNA allowing for the formation of chromosomes during mitosis

Q9

10. Protein expression can be blocked by antisense oligonucleotides. Which mechanism enables antisense oligonucleotides to block protein synthesis? O Antisense oligonucleotides bind to ribosomes and inhibit their function. Antisense oligonucleotides bind to DNA in the nucleus and inhibit the synthesis o MRNA. Antisense oligonucleotides bind to ribosomal RNA (rRNA) and inhibit ribosome assembly. Antisense oligonucleotides bind to messenger RNA (MRNA) and prevents mRNA binding to ribosomes.

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5. DNA is made of two strands that are antiparallel. If one strand runs from 3' to 5' direction the other one will go from 5' to 3' direction. During replication or transcription, whatever the process is, it will always follow the 5' to 3' direction using the 3' to 5' directed strand as the template strand. Therefore, if following is the DNA sequence 5'-CCG ATC GCA CAA-3' a) Using this sequence as template after transcription no protein can be translated. Why? I. Presence of start codon II. Absence of start codon III. Due to mutation b) If you want to start the translation, what change you need in the second codon (from 5' to 3' direction)? I. Substitution of C with G II. No change III. Deletion of C IV. Both I & III

The sequence below is one strand from a double-stranded DNA molecule. How many hydrogen bonds hold this double-stranded molecule together? 5' TATTCCGATAG 3' O 22 26 29 O 3 O 52 O Ooo

What is the function of DNA ligase? put DNA together are involved in transcription break down DNA fix the mismatch pairing are part of the ribosomes synthesis

Match the statement with the phase of the cell cycle it describes. The nucleus divides O G1 G2 O mitosis O cytokinesis

Which of the following is something that DNA and RNA have in common? They are both nucleic acids They are both only found in the nucleus They are both made of deoxyribose sugar They are both double stranded Sign out US Lenovo 40 esc $4 1. 2 4. 7 tab W e r y f k a V n shift alt ctrl ctrl alt

A DNA polymerase has everything it needs for extension, EXCEPT for RNA primers. What is the most likely consequence of this? No DNA replication will occur at all O DNA replication will occur much more slowly O Replication will be highly error-prone O Only one DNA strand will be replicated