TLS Online TPP Program

#Question id: 11145


Two fundamental concepts about the ion channels of a "resting" neuron are that the channels ________.

#XL - T Zoology
  1. are always open, but the concentration gradients of ions frequently change
  2. are always closed, but ions move closer to the channels during excitation
  3. are open or closed depending on their type, and are specific as to which ion can traverse them
  4. open in response to stimuli, and then close simultaneously, in unison
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TLS Online TPP Program

#Question id: 10276

#XL - Q Biochemistry

In glycolysis, the enzyme glyceraldehyde 3-phosphate dehydrogenase catalyzes;

TLS Online TPP Program

#Question id: 10278

#XL - Q Biochemistry

The type of ATP synthesis, traditionally referred to as substrate-level phosphorylation involves the direct transfer of a phosphate group, which reactions perform substrate-level phosphorylation?

a) Conversion of Glyceraldehyde 3-phosphate to 1,3-Bisphosphoglycerate

b) Conversion of Phosphoenol pyruvate to pyruvate

c) Conversion of Fructose 6-phosphate to Fructose 1,6-bisphosphate

d) Conversion of 1,3-Bisphosphoglycerate to 3-Phosphoglycerate

Find the correct one.

TLS Online TPP Program

#Question id: 10279

#XL - Q Biochemistry

Phosphohexose isomerase is one of the enzyme of glycolysis which catalyzes Glucose 6-phosphate to Fructose 6-phosphate, enzyme bind with the hexose in their active site by opening the structure. The ring opening and closing reactions are catalyzed by an active-site present amino acid such as

TLS Online TPP Program

#Question id: 10280

#XL - Q Biochemistry

The enzyme of glycolytic pathway that forms fructose 1,6-bisphosphate is called phosphofructokinase-1 (PFK-1), which statements can’t distinguish it from a second enzyme (PFK-2) Phosphofructokinase-2.

TLS Online TPP Program

#Question id: 10281

#XL - Q Biochemistry

Gluconeogenesis is particularly important in plants such as the castor oil plant Ricinus communis and sunflower that store carbon in which form .

TLS Online TPP Program

#Question id: 10282

#XL - Q Biochemistry

In the glycolytic reaction one of the step is catalyzed by ATP-dependent phosphofructokinase is essentially irreversible, at the same step which one of the following enzyme used in gluconeogenesis, both of the enzymes are ATP dependent.