List of top Questions asked in GATE BT

If \(1000\) bp of a double-helical DNA weighs \(1\times10^{-18}\) g and the distance between two bp is \(0.34~\text{nm}\), the total amount of DNA (in mg, rounded to one decimal) required to stretch from Earth to Moon (distance \(=3.74\times10^{5}\) km) is ________________.
A protein has three identical sites arranged at the vertices of an equilateral triangle. With one site filled with donor dye, the quantum yield \(\phi_D\) is \(0.5\). Filling one site with donor and a second with acceptor gives \(\phi_D=0.25\). Find \(\phi_D\) when one site has donor and the other two have acceptor dyes (rounded to three decimals).
Direct DNA transfer method(s) used for plant genetic engineering is(are)
Which of the following vector(s) is(are) used to clone a DNA fragment of size 220 kb?
The following reaction represents biomass synthesis from hexadecane:
\(\,C_{16}H_{34} + 12.5 O_2 + 2.13 NH_3 \rightarrow 10.6 CH_{1.66}O_{0.27}N_{0.27} + 5.37 CO_2 + 11.4 H_2O \)
where \( CH_{1.66}O_{0.27}N_{0.27} \) represents the biomass. The value of respiratory quotient (rounded off to two decimal places) is ________________.
Aqueous two-phase extraction is used to recover \(\alpha\)-amylase from a solution. A polypropylene glycol–dextran mixture is added and the solution separates into upper and lower phases. The partition coefficient is 4.0 and the ratio of upper to lower phase volume is 5.0. The enzyme recovery or yield (in percentage, rounded off to the nearest integer) is ____________________.
The event(s) that lead(s) to inactivation of tumor suppressor genes in cancer cells is(are)
Methylation of CpG islands near the promoter of a gene can inhibit transcription by
Which of the following statement(s) is(are) TRUE about induced pluripotent stem cells?
Which of the following statement(s) is(are) TRUE about fluoroquinolone drugs?
Which of the following is(are) plant protoplast fusogenic agent(s)?
The value of \(\displaystyle \lim_{x\to 0}\left[\frac{\cos 2x-\cos 4x}{x^2}\right]\) is __________________.
A series \(S\) is given as \(S=1+3+5+7+9+\dots\). The sum of the first 50 terms of \(S\) is __________________.
Two fair six-sided dice are thrown. The probability of getting \(12\) as the product of the numbers on the dice (rounded off to two decimal places) is __________________.
If \(7^{3x}=216\), the value of \(7^{-x}\) (rounded off to three decimal places) is __________________.
The distance between the two points of intersection of \(x^{2}+y=7\) and \(x+y=7\) (rounded off to two decimal places) is __________________.
Match the types of RNA in Group I with their corresponding function in Group II.
Group I:
P. mRNA
Q. rRNA
R. miRNA
S. tRNA
Group II:
1. Serves as adaptors between mRNA and amino acids during protein synthesis
2. Regulates post-transcriptional gene expression
3. Codes for proteins
4. Forms the core of the ribosome structure and catalyzes protein synthesis
Which one of the following programs is used for finding distantly related (or remote) protein homologs?
Which one of the following is used for global alignment of two protein sequences?
Which one of the following methods CANNOT be used to determine the secondary structure content of a protein?
Which one of the following plant growth regulators facilitate adventitious root formation?
Fabry disease in humans is a X-linked disease. The probability (in percentage) for a phenotypically normal father and a carrier mother to have a son with Fabry disease is ________________.
Which one of the following is required for the development of B-cells in the bone marrow?
Which one of the following statements is TRUE about leghemoglobin?
The correct sequence of events during bacteriophage infection of a bacterial cell is