Which of the following microbes is NOT involved in the preparation of household products?
A. Aspergillus niger
B. Lactobacillus
C. Trichoderma polysporum
D. Saccharomyces cerevisiae
E. Propionibacterium sharmanii

Choose the correct answer from the options given below:

Which of the following structures or regions is incorrectly paired with its function?

The type of conservation in which the threatened species are taken out from their natural habitat and placed in special setting where they can be protected and given special care is called

A good producer of citric acid is

Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by

The blue and white selectable markers have been developed which differentiate recombinant colonies from non-recombinant colonies on the basis of their ability to produce colour in the presence of a chromogenic substrate.

Given below are two statements about this method:
Statement I : The blue coloured colonies have DNA insert in the plasmid and they are identified as recombinant colonies.

Statement II : The colonies without blue colour have DNA insert in the plasmid and are identified as recombinant colonies.

In the light of the above statements, choose the most appropriate answer from the options given below:

Which part of poppy plant is used to obtain the drug \(“Smack”\)?

A car starts from rest and accelerates at \(5 \,\mathrm{~m} / \mathrm{s}^{2}\). At \(t=4 \mathrm{~s}\), a ball is dropped out of a window by a person sitting in the car. What is the velocity and acceleration of the ball at \(\mathrm{t}=6\, \mathrm{~s}\) ? (Take g \(\left.=10\, \mathrm{~m} / \mathrm{s}^{2}\right)\)

Three resistors having resistances \(\mathrm{r}_{1}, \mathrm{r}_{2}\) and \(\mathrm{r}_{3}\) are connected as shown in the given circuit. The ratio \(\frac{i_{3}}{i_{1}}\) of currents in terms of resistances used in the circuit is :

Twins are born to a family that lives next door to you. The twins are a boy and a girl. Which of the following must be true?

Read the following statements:
\((a)\) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.
\((b)\) Conjoint closed vascular bundles do not possess cambium
\((c)\) In open vascular bundles, cambium is present in between xylem and phloem
\((d)\) The vascular bundles of dicotyledonous stem possess endarch protoxylem
\((e)\) In monocotyledonous root, usually there are more than six xylem bundles present.
Choose the correct answer from the options given below:

The production of gametes by the parents, the formation of zygotes the \(F_1\) and \(F_2\) plants, can be understood using

A circuit when connected to an \(A.C.\) source of \(12\; V\) gives a current of \(0.2\; A\). The same circuit when connected to a \(D.C.\) source of \(12\; V\), glves a current of \(0.4\; A\). The circuit is