AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is NOT a true statement?
A
DNA has 2 strands, RNA has 1
B
DNA and RNA can both leave the nucleus
C
DNA and RNA have different nitrogen bases
D
DNA has deoxyribose, RNA has ribose sugar
Explanation: 

Detailed explanation-1: -Eukaryotic DNA never leaves the nucleus; instead, it’s transcribed (copied) into RNA molecules, which may then travel out of the nucleus. In the cytosol, some RNAs associate with structures called ribosomes, where they direct synthesis of proteins.

Detailed explanation-2: -Answer and Explanation: B (DNA is transported to the cytoplasm for transcription) is the statement about DNA vs RNA that is false.

Detailed explanation-3: -In eukaryotes, mature mRNA molecules must leave the nucleus and travel to the cytoplasm, where the ribosomes are located. On the other hand, in prokaryotic organisms, ribosomes can attach to mRNA while it is still being transcribed.

Detailed explanation-4: -DNA is found mostly in the cell nucleus, but another type of nucleic acid, RNA, is common in the cytoplasm.

There is 1 question to complete.