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A)energizes the formation of the initiation complex, using initiation factors.

B)separates the small and large subunits of the ribosome at the stop codon.

C)hydrolyzes to provide energy for making peptide bonds.

D)hydrolyzes to provide phosphate groups for tRNA binding.

E)supplies phosphates and energy to make ATP from ADP.

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What role does the GTP Krebs cycle play in cellular respiration and energy production?

The GTP Krebs cycle, also known as the citric acid cycle, is a key part of cellular respiration. It helps break down molecules from food to produce energy in the form of ATP. This cycle generates GTP, which can be converted to ATP, providing the cell with the energy it needs to function.


Why is the GTP produced by the citric acid cycle energetically equivalent to ATP in metabolism?

GTP produced by the citric acid cycle energetically equivalent to ATP in metabolism because both ATP and GTP contain 3 phosphate groups and adenine and guanine are both the same type of nucleic acid. Moreover, they have very similar in its structure and energetic properties with each others


Why ATP is needed not GTP for hexokinase reaction?

ATP is used in the hexokinase reaction because it acts as the source of phosphate for the phosphorylation of glucose to form glucose-6-phosphate. Hexokinase specifically recognizes and phosphorylates glucose, and it has a higher affinity for ATP compared to GTP. Therefore, ATP is the preferred energy source for this reaction.


What are the differences between the energy currency molecules GTP and ATP, and how do they impact cellular processes?

GTP and ATP are both energy currency molecules used by cells, but they have some key differences. GTP is mainly used in protein synthesis and signal transduction, while ATP is more versatile and used in various cellular processes like muscle contraction and active transport. The differences in their structures and functions allow cells to regulate different processes efficiently.


What is the major functional difference between the succinyl CoA-synthetase of plant and animal cell mitochondria?

The major functional difference lies in the source of the phosphate group used in the reaction: plants use inorganic phosphate, while animals use a nucleoside diphosphate. This difference reflects the evolutionary divergence in metabolic pathways between plants and animals.