Biology Chapter 20 Class 12 Short Questions

Al-Huda Science Academy has specifically designed Biology Chapter 20 Class 12 Short Questions to help the students for their Punjab Board examination.

These questions are important according to board point of view. All questions are given with page numbers for easy approach of students. The answers to the questions have not been uploaded but we are trying our best to facilitate the students with best possible answers that can help them well in papers.

Biology Chapter 20 Class 12 Short Questions

Give types of chromosomes. Page 123
What are Karyotypes? Page 123
What are Nucleosomes? Page 124
Differentiate between Heterochromatin and Euchromatin. Page 124
Give evidences which support Sutton’s Theory. Page 125
What is objection to Sutton’s Theory? Page 125
What is X-linked trait? Page 126
Define Transformation. Page 127
What is Phosphodiester Bond? Page 129
Draw Phosphodiester Bond. Page 130
What is X-Ray Diffraction Technique? Page 131
What is Conservative, Semi-conservative and Dispersive Model of Replication? Page 131
Give molecular structure of DNA Polymerase III. Page 135
What is Primer? Page 135
Differentiate between Leading and Lagging strand. Page 136
What are Okazaki fragments? Page 136
What is Alkaptonuria? Page 137
What are Dubbed arg-mutants. Page 137
What is Central Dogma. Page 140
Draw two- dimensional structure of tRNA. Page 141
Draw three-dimensional structure of tRNA. Page 141
Differentiate between Antisense and Coding Strand. Page 141
What is Promoter. Page 140
How eukaryotic mRNA is protected from enzymes. Page 142
What is non-sense or Stop codons. Page 143
Genetic code is universal. Explain? Page 143
Genetic code is not universal. Explain? Page 143
Give structure of larger subunit of Ribosomes. Page 144, 145
What are Releasing Factors. Page 145
Give causes of Mutation. Page 146
What are Chromosomal Aberrations. Page 146
What is Point Mutation. Page 146
What is phenyl ketonuria. Page 147