TLS Online TPP Program

#Question id: 5576


The polarity of a plant is established when ________.

#Unit 5. Developmental Biology
  1. cotyledons form at the shoot end of the embryo

  2. the shoot-root axis is established in the embryo

  3. the primary root breaks through the seed coat

  4. the shoot first breaks through the soil into the light as the seed germinates

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TLS Online TPP Program

#Question id: 2773

#Unit 2. Cellular Organization

Which of the following is an algorithm designed to compare the sequence of a newly identified protein with sequences already stored in the GenBank database?

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?