GATE BT 2026 Paper 1 — page 21

Questions 61–63 of 65. Imported answers require review unless explicitly marked reviewed.

A microbe that follows Monod growth kinetics on a limiting substrate (maximum specific growth rate of 0.5 h

and Monod constant of 0.1 mg L

) is cultivated in a continuous reactor for microbial growth (chemostat with sterile feed). Given that the chemostat volume is 5 L and inlet concentration of limiting substrate is 10 g L

, the minimum inlet feed flow rate for chemostat washout is ______ L h

. (rounded off to one decimal place)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

It is desired to cultivate 150 mg (dry weight) microbial cells with an empirical formula of C

N. If the phosphorus requirement for the cells is 20% of the nitrogen requirement (on a weight basis), the minimum amount of phosphorus required to be added to the cultivation medium is _______ mg. (rounded off to one decimal place)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

In the process of generating a clonal mammalian cell line, a single cell was seeded in a well of a cell culture plate. After the first 48 hours, one of the progeny cells underwent apoptosis due to a new mutation. If the doubling time of the cells is 24 hours and no more cell death occurs, the total number of cells after a total of 7 days from seeding will be _____. (answer in integer)

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

2026 · Paper 1

Question 61

Question 62

Question 63