Comparative Analysis of Cytochrome C

Mr. Morel introduces a lab focused on comparing cytochrome C proteins across species to understand evolutionary relationships. The lab involves biochemical comparisons, particularly of RNA, DNA, and proteins. Students will compare amino acid sequences to determine evolutionary links and use the data to construct a phylogenetic tree. The session concludes with instructions for completing the lab and preparing for the next class.

What is the primary focus of the Cytochrome C comparison lab?

• To study the structure of proteins

• To compare human and animal DNA

• To understand biochemical evidence for evolution

• To learn about the history of cytochrome C

Which molecule is NOT mentioned as part of the biochemical comparisons in the lab?

• RNA

• DNA

• Lipids

• Proteins

How are amino acids represented in the lab's methods?

• By three-letter codes

• By numbers

• By single alphabetical letters

• By their full names

What is the purpose of comparing amino acid sequences between different organisms?

• To find evolutionary relationships

• To determine their diet

• To identify their habitat

• To measure their size

What is the next step after counting the differences in amino acid sequences?

• Creating a phylogenetic tree

• Writing a report

• Performing a chemical test

• Conducting a survey

Which organisms share identical versions of cytochrome C according to the lab?

• Pig and zebra

• Human and chimpanzee

• Chicken and cow

• Horse and donkey

What does a smaller number of differences in cytochrome C sequences suggest about two organisms?

• They have different diets

• They live in the same habitat

• They are from different species

• They have a more recent common ancestor

What is the final task in the lab activity?

• To conduct an experiment

• To present findings to the class

• To complete a phylogenetic tree

• To write a summary

Why are some data boxes shaded out in the comparison table?

• To indicate errors

• To separate different species

• To avoid repetition

• To highlight important data

What should students do if they finish the lab activity early?

• Work ahead on questions

• Start a new project

• Review the material

• Wait for further instructions