When an amino acid is added to its corresponding tRNA, ATP is converted to ADP as a coupled reaction. False, NADPH, not ATP is used to form a new bond between tRNA and the corresponding amino acid. False, ATP is converted to AMP. True
Added by Dylan C.
Close
Step 1
Step 1: The question asks whether ATP is converted to ADP when an amino acid is added to its corresponding tRNA. Show more…
Show all steps
Your feedback will help us improve your experience
Rabeya Zahid and 64 other Biology educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
The charging of a tRNA with an amino acid can be represented by the following equation: \[ \text { amino acid }+\mathrm{tRNA}+\mathrm{ATP} \rightarrow \text { aminoacy } |-\mathrm{tRNA}+\mathrm{AMP}+\mathrm{PP}_{\mathrm{i}} \] where $P P_{i}$ is pyrophosphate (see Figure $3-41$ ). In the aminoacyl-tRNA, the amino acid and tRNA are linked with a high-energy covalent bond; a large portion of the energy derived from the hydrolysis of ATP is thus stored in this bond and is available to drive peptide bond formation during the later stages of protein synthesis. The free-energy change of the charging reaction shown in the equation is close to zero and therefore would not be expected to favor attachment of the amino acid to tRNA. Can you suggest a further step that could drive the reaction to completion?
Which of the following statements is false about ATP? Phosphorylating ADP to ATP is an endergonic reaction. ATP is a purine ribonucleotide triphosphate. As ATP is used, it must be replaced from nucleotides in the organism's diet. ATP is a product of enzymatic coupled reactions. Cellular ATP levels are regulated by end-product inhibition of catabolic pathways.
Joanna Q.
Amino acid tRNA synthetases catalyze a two-step reaction - in the first step, the amino acid is activated with ATP, forming an aminoacyl-AMP. In the second step, the aminoacyl group is transferred to a hydroxyl group of the tRNA terminal residue.
Adi S.
Recommended Textbooks
Biology for AP Courses
Objective Biology for NEET
Introduction to General, Organic and Biochemistry
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD