DNA Replication and Protein Synthesis

What did Rosalind Franklin contribute to the understanding of DNA molecules?

• An analysis of the chemical makeup of DNA

• A theory about how DNA conveys genetic information

• An image indicating the shape of a DNA molecule

• A thought about how DNA conveys genetic information

Molecules of DNA are made of long chains of

• amino acids

• fatty acids

• simple sugars

• nucleotides

During DNA replication, what occurs?

• The covalent bonds between sugar and phosphate are broken

• The hydrogen bonds between nitrogenous bases are broken

• The covalent bonds between pairs of nitrogenous bases are broken

• The hydrogen bonds between sugar and phosphate molecules are broken

Which of these is an example of collaboration between scientists?

• Koch studied infectious disease and Pasteur disproved spontaneous generation

• Mendel studied pea plants which enabled Morgan to locate a gene on a fruit fly chromosome

• Crick and Watson worked together to design the double helix model of DNA

• Leeuwnehoek perfected the microscope which allowed others to view microscopic organisms

Chargaff discovered that the amount of adenine = the amount of thymine. This was used to develop which aspect of DNA?

• structure

• location

• volume

• solubility

Scientists classifying modern animals are most likely to compare the

• structure of the animals' ATP

• function of the animals' limbs

• composition of the animals' bones

• sequence of the animals' DNA

New mRNA is made through the process of

• transcription

• translation

• replication

• transposition

How do 4 different nucleotides result in 20 different amino acids?

• The 4 bases are converted into tRNA which attache to 16 different amino acids

• The 4 bases combine in 3 letter sequences that each define an amino acid.

• The 4 bases combine in 2 letter sequences that each define an amino acid.

What is the function of tRNA?

• Links together the amino acids brought to the ribosome by mRNA

• Carries the correct amino acid to its correct codon

• Converts DNA to RNA

• Makes amino acids needed at the ribosome

How many amino acids would be linked together to form a protein based on the DNA sequence ATTGCCGTA

• 2

• 9

• 3

• 8