List of practice Questions

The specific growth rate of a mold is 0.15 h\(^{-1}\). If the cell concentration at 30 h is 33 g L\(^{-1}\), the concentration at 24 h (rounded to nearest integer) is \(\underline{\hspace{1cm}}\).
A sedimentation tank of height 100 cm is used to separate granular biomass of 0.5 mm diameter. Viscosity = 1 cP; density difference = 0.1 g cm\(^{-3}\). Settling time in min (rounded to two decimals) is \(\underline{\hspace{1cm}}\).
Tertiary structure of a protein consisting of $\alpha$-helices and $\beta$-strands can be determined by:
Which of the following statement(s) is/are CORRECT about Agrobacterium tumefaciens?
Which of the following antimicrobial agent(s) is/are growth factor analog(s)?
Which of the following chemical messenger(s) is/are derivative(s) of tryptophan?
Which of the following nucleus/nuclei is/are NMR active?
In a Mendel's dihybrid experiment, a homozygous pea plant with round yellow seeds was crossed with a homozygous plant with wrinkled green seeds. F\(_1\) intercross produced 560 F\(_2\) progeny. The number of F\(_2\) progeny having both dominant traits (round and yellow) is \(\underline{\hspace{1cm}}\).
Which one of the following tools is used to compare all the possible six-open reading frames of a given nucleotide query sequence with all the available six-open reading frames of the nucleotide sequence database?
In Neurospora crassa, a mutation in the poky gene results in slow growth (poky). The results of four crosses are given:
(1) wild-type ♀ × wild-type ♂ → All progeny wild-type
(2) wild-type ♀ × poky ♂ → All progeny wild-type
(3) poky ♀ × wild-type ♂ → All progeny poky
(4) poky ♀ × poky ♂ → All progeny poky
Which one of the following explains the inheritance mode of poky?
The sum of the infinite geometric series \( 1 + \frac{1}{3} + \frac{1}{3^2} + \frac{1}{3^3} + \ldots \) (rounded off to one decimal place) is \(\underline{\hspace{1cm}}\).
Three balls colored blue, green and red are transferred from box A to box B in the order BLUE–GREEN–RED. The probability that they are transferred back from box B to box A in the same order (rounded off to two decimal places) is \(\underline{\hspace{1cm}}\).
Decimal reduction time of a bacterial strain is 20 min. Specific death rate constant in min\(^{-1}\) (rounded off to two decimal places) is \(\underline{\hspace{1cm}}\).
Two reactors of volumes 5 L and 10 L contain an ideal gas at 9 atm and 6 atm. When the valve is opened, the final equilibrium pressure (atm) of the system is \(\underline{\hspace{1cm}}\).
For enzyme \(\alpha\)-amylase with \(K_m = 0.005\,M\), the substrate concentration for one-fourth of \(V_{\max}\) (rounded to two decimals, mM) is \(\underline{\hspace{1cm}}\).
A protein without its prosthetic group is known as:
The enzyme which adds phosphate group to the free 5' terminus of a DNA sequence is
Which one of the following is CORRECT about microbial growth medium?
The cellular process which utilizes RNA-induced silencing complex to block gene expression is
Which of the following layer(s) is/are formed from the inner cell mass of the blastocyst?
Which of the following cell organelle(s) is/are surrounded by a single phospholipid membrane?
\(\frac{d}{dx}[\ln(2x)]\) is equal to
Which one of the following techniques/tools is NOT used for inserting a foreign gene into a cell?
Under standard temperature (T) and pressure (P) conditions, 128 g of an ideal gas molecule A occupies a volume of 1 L. The gas molecule A obeys the relationship $RT = 0.25PV$. R and V are universal gas constant and ideal gas volume, respectively. The molecule A is:
CRISPR-Cas system is associated with: