Class 12 Biology Objective In English

1. Which of the following enzyme is used to break the bacterial cell wall to release DNA and other bio macro molecules? ( A ) Lysozyme ( B ) Cellulase…

1. A molecular technique in which multiple copy of the desired gene is synthesized in vitro is called as (A) ELISA (B) PCR (C) Gel Electrophoresis (D) Flow cytometry Answer-(…

1. Aquatic fern which is an excellent biofertilizer : ( A ) Salvinia ( B ) Azolla ( C ) Marsellia ( D ) Pteridium Answer-( B )   2.…

1. Which in the following is an improved variety of chicken ? ( A )Jersey ( B ) Leghorn ( C ) Himgiri ( D ) Kalyansona Answer-( B )…

1.HIV attacks : ( A ) B-lymphocytes ( B ) Antibodies ( C ) T-lymphocytes ( D ) Erythrocytes Answer-( C )   2. Aquatic fern which is an excellent…

1. Major radiation of mammals, birds and pollinating insects took place in which epoch? ( A ) Oegocene ( B ) Eocene ( C ) Pliocene ( D ) Palaeocene…

1. In DNA , the nitrogenous bases are : ( A ) ATUC ( B ) AUGC ( C ) UTGC ( D ) ATGC Answer-( D )   2.…

1. A tall plant on selfing produce tall and dwarf both What are the probabilities that first offspring will be ?  ( A ) tall ( B ) dwarf (…

1. Which mechanical device to control child birth is fitted on the cervix ? ( A ) Diaphragm ( B ) Condom ( C ) Loop ( D ) Copper…

1. The part of fallopian tube closest to the ovary is : ( A ) isthumus ( B ) infundibulum ( C ) cervix ( D ) ampulla Answer-( B…