Why do the cells of the digestive system secrete certain enzymes, such as pepsin, in their inactive forms?

What will be an ideal response?


Ans: These proteolytic enzymes, in active form, would digest the very tissues that synthesize them.

Biology & Microbiology

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Oceans and the tropical rain forests contribute equally to global productivity

Indicate whether the statement is true or false.

Biology & Microbiology

DNA contains all of the following nitrogen-containing bases EXCEPT ____

a. adenine b. uracil c. guanine d. adenine e. thymine

Biology & Microbiology

The Salalizard is a fictional vertebrate that lives in the forest and appears to be half salamander and half lizard. You are not allowed to collect any wild animals, so you decide to take a video of it to show your colleagues. What behavior best

distinguishes the Salalizard as either a salamander (amphibian) or a lizard (reptile)? A) what the animal eats B) if it lives in trees C) where it reproduces D) whether it is active at night

Biology & Microbiology

Which of the following types of plasmids allows a bacterial cell to kill its competitors?

A) virulence plasmids B) fertility plasmids C) bacteriocin plasmids D) resistance plasmids E) cryptic plasmids

Biology & Microbiology