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TLS Online TPP Program

#Question id: 13097

You are a scientist who is using genomics to currently study a new bacterial species that no one has ever studied before. The following sequence is a piece of DNA within the coding region of a gene that you have recently sequenced.
 
If you take any bacterial gene sequence, before you begin doing any sequence analysis on it, there are six potential open reading frames. Why are there six?

#Unit 13. Methods in Biology
  1. There are 3 reading frames on each of two strands, because the top strand looked like the mRNA, then the reading frame could start with a CCC, a CCG, or a CGT and If the bottom strand looked like the mRNA, then the reading frame could start with a TGT, a GTT, or a TTC.
  2. There are 6 reading frames on each of two strands because the strand look like the mRNA, then the reading frame could start with a CCC, a CCG, a CGT, a GTA, TAC or a ACG.
  3. There are 3 reading frame only on the top of the strand looked like the mRNA, then the reading frame could start with a CCC, a CCG, or a CGT.
  4. There are 3 reading frames on each of two strands, because the top strand looked like the mRNA, then the reading frame could start with a CCC, a CCG, or a CGT and If the bottom strand looked like the mRNA, then the reading frame could start with a GGG, a GGC, or a GCA.
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TLS Online TPP Program

#Question id: 11647

#Unit 7. System Physiology – Animal

After menopause, hormone replacement therapy with estrogen-like compounds is effective in preventing the progression of osteoporosis. What is the mechanism of their protective effect?
TLS Online TPP Program

#Question id: 11648

#Unit 7. System Physiology – Animal

Within minutes following a normal delivery, flow through the foramen ovale decreases dramatically. What is the cause of this change?
TLS Online TPP Program

#Question id: 11649

#Unit 7. System Physiology – Animal

The red lines in the figure above illustrate the normal relationships between plasma insulin concentration and glucose production in the liver and between plasma insulin concentration and glucose uptake in muscle


In the figure, which lines most likely illustrate these relationships in a patient with type 2 diabetes?
TLS Online TPP Program

#Question id: 11650

#Unit 7. System Physiology – Animal

The red lines in the figure above illustrate the normal relationships between plasma insulin concentration and glucose production in the liver and between plasma insulin concentration and glucose uptake in muscle.


 

In the figure, which lines most likely illustrate these relationships in a patient with acromegaly?
TLS Online TPP Program

#Question id: 11681

#Unit 7. System Physiology – Animal

A baby is born with a penis, a scrotum with no testes, no vagina, and XX chromosomes. This condition is referred to as hermaphroditism. Which of the following could cause this abnormality?
TLS Online TPP Program

#Question id: 11682

#Unit 7. System Physiology – Animal

A young woman is given daily injections of a substance beginning on the 16th day of her normal menstrual cycle and continuing for 3 weeks. As long as the injections continue, she does not menstruate. The injected substance could be which of the following?