TLS Online TPP Program

#Question id: 10332


The four-chambered hearts of birds and the four-chambered hearts of mammals evolved independently of each other. If one were unaware of this independence, then one might logically conclude that

#Unit 9. Diversity of Life Forms
  1. the birds were the first to evolve a 4-chambered heart.
  2. birds and mammals are more distantly related than is actually the case.
  3. early mammals possessed feathers.
  4. the common ancestor of birds and mammals had a four-chambered heart.
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TLS Online TPP Program

#Question id: 2774

#Unit 2. Cellular Organization

The DNA and protein sequences of the -tubulin genes in humans and in fish are similar, and because each arose due to speciation, these genes would be considered:

TLS Online TPP Program

#Question id: 2775

#Unit 2. Cellular Organization

To examine the folding and compaction of chromatin during mitosis, you will need to isolate and stain chromosomes at a particular stage using a special spreading preparation technique. For the best analysis, the chromosomes must be at which one of the following stages?

TLS Online TPP Program

#Question id: 2776

#Unit 2. Cellular Organization

There are five major types of histone proteins, but only four of them are considered as core histones. Which one of the following is NOT considered a core histone protein?

TLS Online TPP Program

#Question id: 2777

#Unit 2. Cellular Organization

Histone modifications play integral roles in chromatin condensation and function. Which of the following is NOT considered to be a histone modification?

TLS Online TPP Program

#Question id: 2778

#Unit 2. Cellular Organization

You are studying the regulation of a group of genes and have determined that the full activation of transcription of these genes occurs when histone acetyl transferases have made post-translational modifications specifically to which one of the following amino acids?

TLS Online TPP Program

#Question id: 2780

#Unit 2. Cellular Organization

Which of the following pairs of proteins are considered to be paralogous?