MHT-CET PCB 02 — MHT - CET STD 12 Science — Question

Identify the CORRECT statements from the following.

(I) Both lanthanoids and transition metals show magnetism.

(II) Both lanthanoids and actinoids form oxocations.

(III) Both lanthanoids and actinoids show decrease in ionic radius with an increase in atomic number.

(IV) Both lanthanoids and transition metals show fixed geometries.

Following are the four statements regarding separation of DNA fragments using Gel electrophoresis. Identify the INCORRECT statements.

i. DNA is negatively charged molecule and so it is loaded on gel towards the Anode terminal.

ii. DNA fragments travel along the surface of the gel whose concentration does not affect movement of DNA.

iii. Smaller the size of DNA fragment, larger is the distance it travels through it.

iv. Pure DNA can be visualized directly by exposing to UV radiation.

Which of the following is not present in DNA?

The most abundant cellular protein is ______.

Which among the following polymers is obtained first by formation of salt by neutralization and then by step growth polymerization?

In the absence of fertilization, corpus luteum ____________.

Match the list I with List II and select the correct answer.

	List I		List II
i.	Vector	a.	Resistant to cotton bollworms.
ii.	Downstream processing	b.	Mobile genetic elements
iii.	Cry Proteins	c.	Controls com borer
iv.	Transposons	d.	Purifying protein in bio harmaceuticals.

If 2 kJ of heat is released from system and 6 kJ of work is done on the system, what is enthalpy change of system?