An 8-year-old male is frequently coming to the clinic for persistent skin infections that do not heal within a normal time frame. He had a normal recovery from the measles. Checking his antibodies following immunizations yielded normal antibody responses. A defect in which of the following cells would most like be the cause of the continual infections?

#Question id: 4656

#Unit 11. Evolution and Behavior

Logically, which of these should cast the most doubt on the relationships depicted by an evolutionary tree?

#Question id: 18876

#Unit 9. Diversity of Life Forms

#Question id: 26909

#Unit 10. Ecological Principles

Organic matter is limited at one particular horizon layer and not found in other layer at which horizon layer has organic matter is limited?

#Question id: 10490

#Unit 6. System Physiology – Plant

Which of the following is a correct Match of the stomatal opening and closing mechanism;

               COLUMN A                                                                    COLUMN B

P- Opening of Stomata                        i) Chloride anions are taken up into the guard cells from the apoplast

Q- Closing of stomata                         ii) The malate content of guard cells decreases

iii) starch content in guard cells increases during end of the

iv) Acidification of the lumen stimulates zeaxanthin formation which activates the H+ ATPase causing

v) Accumulation of solute in vacuole such as sucrose and malate leads to

#Question id: 651

#Unit 1. Molecules and their Interaction Relevant to Biology

Consider an enzyme catalysed reaction treated with inhibitor. Enzyme kinetic was analysed with Eadie Hofstee equation. A plot of V0 versus V0/[S] for an enzyme-catalyzed reaction is shown below. The control curve was obtained in the absence of inhibitor. Which effect is shown on the enzyme activity when an inhibitor is added to the reaction mixture?