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CBSE 12 Biology Question Paper-2020 Set-2
This mock test includes actual CBSE Class 12 Biology board exam questions from the year 2020 Set-2, helping students understand exam trends and practice real paper format
Duration
30 min
Questions
30
Marking
Negative
Questions Preview
‘Cry’ protein’ coded by gene Cry IAb controls
Meselson and Stahl carried out centrifugation in CsCl2 density gradient to separate
‘Cry’ protein’ coded by gene Cry IAb controls
Explain the change the proinsulin undergoes at the time of its processing to become functional.
Self-pollination is fully ensured if
Zoospores are the reproductive units to carry asexual reproduction in
Micropropagation can be achieved by
The main barrier that prevents the entry of micro-organisms into our body is
Nematode specific genes were introduced into the tobacco host plant using a vector
Which of the following is the most effective method for isolating high-quality DNA?
Which of the following statements is true regarding prokaryotic cells?
Which enzyme is responsible for joining DNA fragments during the process of DNA repair?
Name the genus of baculovirus that acts as a biological control agent in spite of being a pathogen. Justify by giving three reasons that make it an excellent candidate for the job.
Explain the changes that milk undergoes when suitable starter/inoculum is added to it. How does the end product formed prove to be beneficial for human health?
Wings of birds and wings of butterflies contribute to locomotion. Explain the type of evolution such organs are a result of.
The chances of a person suffering from measles in their lifetime are low if they had the disease in early childhood. Justify the statement.
Which of the following is true about bacterial plasmids?
Which one of the following is the correct sequence of events in cellular respiration?
The major site of photosynthesis in plants is
In the human body, the enzyme responsible for digesting carbohydrates is
Which of the following is an example of a parasitic plant?
The formation of gametes from a diploid cell involves the process of
Which of the following is an example of an asexual mode of reproduction?
Which of the following structures is responsible for the exchange of gases in the human body?
Which process is responsible for the conversion of glucose to energy in cells?
Which of the following is a characteristic of a prokaryotic cell?
In the human circulatory system, blood flows through the heart in which order?
Which of the following is a product of anaerobic respiration in muscle cells?
Which of the following hormones is secreted by the pancreas?
What is the function of ribosomes in a cell?