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TLS Online TPP Program

#Question id: 10252

When molecular oxygen is unavailable—for example, in plant roots in flooded soils—glycolysis can be the main source of energy for cells, How?

#Unit 6. System Physiology – Plant
  1. In O2 deprived condition, the fermentative pathways are carried out in the chloroplast, must reduce pyruvate to recycle the NAD produced by glycolysis
  2. under lowoxygen conditions (hypoxia), Pyruvate is reduce with loss of its carboxyl group as CO2 , to yield the acetyl group of acetyl-coenzyme A
  3. O2 deprived condition, the fermentative pathways are carried out in the cytosol, must reduce pyruvate to recycle the NADH produced by glycolysis
  4. pyruvate is converted under hypoxic or anaerobic conditions to propanol and CO2 by fermentative pathways  which recyle the NADH produced by glycolysis
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TLS Online TPP Program

#Question id: 34095

#Unit 3. Fundamental Processes

The origin recognition complex (ORC) is a highly conserved complex found in all eukaryotes. It is composed of six proteins and it binds to 
TLS Online TPP Program

#Question id: 28509

#Unit 5. Developmental Biology

Which factors are expressed In hindlimb bud initiation?
TLS Online TPP Program

#Question id: 2062

#Unit 2. Cellular Organization

Which of the following types of molecules lack hydrophilic domains?
TLS Online TPP Program

#Question id: 429

#Unit 1. Molecules and their Interaction Relevant to Biology

An organism that uses organic molecules as carbon sources and obtains energy by oxidizing inorganic molecules is a(an) ________.
TLS Online TPP Program

#Question id: 4264

#Unit 3. Fundamental Processes

A classic biochemical experiment nicely illustrated the point that the ribosome recognizes tRNA and not the amino acid that it is carrying. In that following observation were made. Which of them can be correct.

A. The cysteine attached to cysteine-tRNACys can be converted to an alanine by chemical reduction to give alanine-tRNACys.

B. Alanine-tRNACys introduces alanines at codons that specify insertion of cysteine.

C. Different mechanism is used to incorporate selenocyteine on tRNA as selenocysteine is incorporated into proteins by chemical modification after translation

D. Selenocysteine is generated enzymatically from serine carried on a special tRNA that is charged by serine-tRNA synthetase

E. Above examples can conclude that the translation machinery relies on the high fidelity of the aminoacyl-tRNA synthetases to ensure the accurate decoding of each mRNA