In flowering plants, double fertilization results in the formation of:

Which of the statements are correct about Thalassemia?
A. In ẞ Thalassemia, production of a globulin chain is affected and in a Thalassemia production of B globulin chain is affected.
B. a Thalassemia is controlled by two closely linked genes HBA1 and HBA2.
C. The genes HBA1 and HBA2 are located on chromosome 11 of each parent.
D. ẞ Thalassemia is controlled by a single gene HBB.
E. The gene HBB is located on chromosome 16 of each parent.
Choose the correct answer from the options given below:

Read the paragraph given below and answer the question.
Insulin used for diabetes was earlier extracted from slaughtered cattle and pigs. Insulin from an animal source, though caused some patients to develop allergy or other type of reactions. Insulin consists of two short polypeptide chains: chain A and chain B, that are linked bridges. In mammals, including human, insulin is synthesised as a pro-hormone.
Bonds which link 'A' and 'B' peptide chains of human insulin are

Which enzyme is used in detergents to remove stains from laundry?

In an ecosystem

Identify the autosome-linked recessive disorder.

Cloning of alien DNA by the host involves -

In a 200 m race, Rohan completes the race in 8 seconds and Vivan completes the race in 10 seconds. By how much distance Rohan beats Vivan?

The value of the definite integral \(I=\int_1^2 \frac{1}{x\left(1+x^2\right)} d x\) is:

The transfer of integral number of ____________ is one of the evidence of quantization of electric charge.

Which of the following elements does not show allotropy?

Answer the question on basis of passage given below :
Vitamins represent a group of organic compounds which are needed in small amount for the healthy growth and maintenance of our body. These are not synthesised by the body and are supplied in the diet. The deficiency of vitamins can be supplemented with medicines.
The pernicious anaemia disease is associated with the deficiency of :

Read the passage carefully and answer the questions
Alcohols and phenols are formed when a hydrogen atom in a hydrocarbon, aliphatic and aromatic respectively is replaced by - OH group. These are further classified on the basis of number of hydroxy groups and according to the hybridization of the carbon atom \(sp ^2\) or \(sp ^3\) to which the -OH group is attached. They find applications in industry as well as in day-to-day life. One of the most commercially obtained alcohol also known as wood spirit is obtained by destructive distillation of wood. Both alcohols and phenols are acidic in nature. The acidity of alcohols and phenols vary according to the nature of substituent(s) attached to them. Alcohols and phenols react with carboxylic acids, acid chlorides and acid anhydrides to form esters. Introduction of acetyl group in alcohols and phenols is called acetylation. Phenol undergo electrophilic aromatic substitution reaction because the -OH activates the benzene ring. It undergoes nitration, halogenation and sulphonation reactions.
Identiify the strongest acidic compound