HSC Science (General) 12th Standard Board Exam - Maharashtra State Board Important Questions

Explain different types of non-genetic RNA with diagrams and functions.

The number of adenine molecules in a given DNA segment is 25 and the number of cytosine molecules is 45, the total number of nucleotides in the segment is _______________.

Give the central dogma of protein synthesis.

The pairing of homologous chromosomes is call______

(a) crossing over

(b) terminalization

(c) synapsis

(d) bivalent

Explain the process of translation.

Define ‘genomics’. Give any ‘two’ applications of it.

As the base sequence present on one strand of DNA decides the base sequence of other strands; this strand is considered as ______.

In an octamer of the nucleosome, core DNA consists of ______ base pairs.

Answer the following question in ‘One’ sentence only:

Enlist the histones which form an octamer of nucleosome.

Attempt any TWO of the following:

Define the terms ‘codon’ and ‘anticodon’. 

Attempt any TWO of the following: 

With the help of a suitable example illustrate ‘Palindrome’. 

Sketch and label the ‘clover leaf model’ of t-RNA.

Short Answer Question:

Write a note on Human genome project (HGP).

Find the odd one out:

What happened when heat-killed S-cells along with living R-cells were injected into mice?

Semiconservative mechanism of DNA was detected using:

What is the role of Mg⁺⁺ in Translation?

Enlist the names of enzymes used in semiconservative replication of DNA?

Differentiate between Heterochromatin & Euchromatin.

Draw a neat and labelled diagram of the Nucleosome.