HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions

What is Red Data Book?

Name the enzyme and state its property that is responsible for continuous and discontinuous replication of the two strands of a DNA molecule

Which of the following is a chemical transmitter in the synapse of neurons?

Vermiform appendix is an example of __________ organ.

(A) vestigeal

(B) homologous

(C) sense

(D) analogous

The phenomenon of industrial melanism demonstrates__________

(a) natural selection

(b) induced mutations

(c) reproductive isolation

(d) geographical isolation

Define Eutrophication.

Select and write the most appropriate answer from the given.

Identify the type of isolation where the members of two populations have different mating behaviour which prevents interbreeding: 

Select and write the most appropriate answer from the given. 
Which stage in the life cycle of silk moth secretes silk? 

Microorganisms also help in production of food like ______________.

Multiple Choice Question:

The molecular knives of DNA are _______.

Multiple Choice Question:

In the RNA molecule, which nitrogen base is found in place of thymine?

How many codons are needed to specify three amino acids?

Multiple Choice Question:

Place the following event of translation in the correct sequence

i. Binding of met-tRNA to the start codon.

ii. Covalent bonding between two amino acids.

iii. Binding of second tRNA.

iv. Joining of small and large ribosome subunits.

Which of the following is the correct recognition sequence of restriction enzyme hind III?

Multiple choice question

An assemblage of individuals of different species living in the same habitat and having functional interactions is _______________.

Growth of bacteria in a newly inoculated agar plate shows ____________.

Multiple Choice Question:

Water movement between the cells is due to ______.

Multiple Choice Question:

In guard cells, when sugar is converted into starch, the stomatal pore ______.

Multiple Choice Question:

Surface tension is due to ____________.

Multiple Choice Question:

Which of the following type of solution has a lower level of solutes than the solution?