MEDIUM
12th CBSE
IMPORTANT
Earn 100

At which ends do 'capping' and 'tailing' of hnRNA occur respectively?

Important Questions on Model Question Papers 5

HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 5
How is a bacterial cell made 'competent' to take up DNA?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 5
How is the action of exonuclease different from that of endonuclease?
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 6
Why are papaya and date palm plants said to be dioecious whereas cucurbits and coconut palms monoecious, in spite of all of them bearing unisexual flowers?
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 7
Linkage and crossing-over of genes are alternatives of each other. Justify with the help of an example.
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 7
Mention the role of ribosomes in peptide-bond formation. How does ATP facilitate it? 
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 8
A potato plant is infected with a virus. Name and explain a method to obtain virus-free potato plants form it.
MEDIUM
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 9
Name an allergen and write the response of the human body when exposed to it.
HARD
12th CBSE
IMPORTANT
Xam Idea Biology>Chapter 22 - Model Question Papers 5>MODEL QUESTION PAPER>Q 10
Name the flowering plant which employs 'sexual deceit' to get pollinated by a species of bee. Write how pollination occurs in this flower?