Table of contents

Skip topic navigation

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

11. Biological Membranes and Transport

Primary Active Membrane Transport

Biochemistry

11. Biological Membranes and Transport

Primary Active Membrane Transport

Previous problemNext problem

Struggling with Biochemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

P-type ATPases ________.

Transport phosphate against its concentration gradient.

Undergo reversible phosphorylation by ATP hydrolysis.

Transport anions only.

Transports phosphate with its concentration gradient.

Phosphorylates cations so they can be transported into the cell.

Previous problemNext problem

Verified step by step guidance

Understand the role of P-type ATPases: These are a class of enzymes that transport ions across cellular membranes using energy derived from ATP hydrolysis.

Recognize the mechanism of action: P-type ATPases undergo a cycle of phosphorylation and dephosphorylation, which is crucial for their function in ion transport.

Identify the type of ions transported: P-type ATPases typically transport cations such as Na+, K+, Ca2+, and H+, rather than anions or phosphate ions.

Clarify the process of phosphorylation: During the transport cycle, a phosphate group from ATP is transferred to the ATPase, causing a conformational change that allows ion transport.

Conclude with the correct statement: The defining feature of P-type ATPases is their reversible phosphorylation by ATP, which is essential for their ion transport function.