Life Sciences
2023 · Paper 1
Take it one question at a time. Try an answer, then check your understanding.
Complete GATE XL 2023 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 43–45 of 122. Imported answers require review unless explicitly marked reviewed.
Question 43
Open questionXL-QMSQ2 marksNeeds review
B cells produce two forms of an immunoglobulin: (i) membrane-bound form, known as B cell receptor (BCR) and (ii) soluble form, known as antibody. Which of the following statements is/are CORRECT about BCR and antibody produced by the same B cell?
Your answerSelect all correct options. You can choose more than one.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 44
Open questionXL-QNAT2 marksNeeds review
A 100 ml solution of pH 10 was well-mixed with a 100 ml solution of pH 4. The pH of the resultant 200 ml solution is __________ (rounded off to two decimal places).
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 45
Open questionXL-QNAT2 marksNeeds review
An organism uses only the glycerophosphate shunt pathway to transport cytosolic NADH to mitochondria. For every two electrons transported, complex I, complex III, and complex IV of the electron transport chain in this organism transport 2.5, 1.5, and 2.0 protons (H⁺), respectively. The H⁺ to ATP ratio of F₀F₁-ATPase of this organism is 4.0. Terminal electron acceptor is oxygen.
The number of ATP molecules synthesized by oxidizing NADH from glycolysis is ________ (rounded off to two decimal places).
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