DNA Quiz

The four types of nucleotides that make up DNA are named for their

• nitrogen-containing bases.

• ring-shaped sugars

• phosphate-containing bases

• U-shaped sugars

The main function of tRNA is to

• bring amino acids from the cytoplasm to the ribosomes

• form a portion of ribosomes, a cell’s protein factories

• carry a message that, when translated, forms proteins

• string together complementary RNA and DNA strands

A primary difference between transcription and replication is that transcription

• is catalyzed by large and complex enzymes

• occurs within the nucleus of eukaryotic cells

• proceeds according to careful cellular control

• happens repeatedly throughout a single cell cycle

When new DNA molecules are formed, almost all errors are detected and fixed by

• the sugar-phosphate backbone

• the correct nucleotide

• one DNA strand

• DNA polymerase

The process that makes an exact copy of a cell’s DNA is called

• preservation

• replication

• transcription

• translation

The process of making new DNA molecules is semiconservative. This means that every new DNA molecule is composed of

• one strand of DNA and one strand of RNA

• two strands that mix original and new DNA

• two completely identical strands of DNA

• one original and one new strand of DNA

What holds base pairs together?

• sugar-phosphate backbones

• hydrogen bonds

• nitrogen-carbon bonds

• pairs of double-ringed nucleotides

After examining the DNA of different organisms, which of the following did Erwin Chargaff conclude about the four bases?

• A= T and C = G

• A+T=C+G

• A= C and G = T

• A=C=G=T

Which RNA bases would pair with TACGAA in transcription? 

• AUGCUU
• ATGCTT
• GCATCC
• GCAUCC

Where does transcription take place?

• nucleus
• cytoplasm
• ribosome