List of top Biology Questions

The arrangement of flowers on the flora axis is known as:
Direction: Read the following statements and answer wrong statements.1. Nitrogenous base is linked to pentose sugar through an N-glycosidic bond.2. Phosphate group is linked to 5'-OH of a pentose sugar through phosphoester bond.3. Two nucleosides are linked through a 3'- 5' N-glycosidic bond.4. Negatively charged DNA is wrapped around positively charged histone octamer to form the nucleosome.5. The chromatin that is more densely packed and stains dark is called euchromatin.
The high energy radiations, salts of heavy metals, CO and protein poisons like cyanides, make protein inactive by
Which of the following statements is/are correct?a. Genes are thread-like structures in the nucleus of a cell formed of DNA, which carries the chromosomes.b. The dominant gene decides the appearance of an organism even in the presence of an alternative gene.c. The recessive gene decides the appearance of a person in the absence of the dominant gene.
The inter-atrial septum in the human heart can be best described as:
Beta-pleated is a secondary structure of the protein. Primary structure folded to form secondary structure. Hydrogen bonds are responsible for the formation of secondary structure. Solve the given question to have a better understanding of the beta-pleated sheet.In β-pleated secondary protein structure there are:
A haem group is a prosthetic group made up of a protoporphyrin ring and a central iron (Fe) atom. Some of the enzymes have haem. Want to know more about it, attempt this question.Which of the following enzymes has/have heme as a prosthetic group?(i) Catalase                            (ii) Carboxypeptidase(iii) Succinic dehydrogenase (iv) Peroxidase
Ammonia is generally excreted through which of the following?
Sucrose is also called as ____.
Nephrons are connected with ______.
Fruit is a modification of:
Unidirectional transmission of a nerve impulse through nerve fiber is due to the fact that:
The carbonic anhydrases form a family of enzymes that catalyze the interconversion between carbon dioxide and water and the dissociated ions of carbonic acid. Want to know a famous achievement of these enzymes? Check out this question.The fastest acting enzyme in the biological kingdom is:
______ is the branch of genetics, which deals with heritable changes in gene activity that are not caused by changes in the DNA sequence.
The filtration slits are formed in the Bowman’s capsule by ________.
Who is known as the direct ancestor of modern man?
Addition of the adulterants reduces the value of _________ in food.
Which one of the following is correct regarding the factors that affects water absorption in plants?
Krebs cycle begins with which of the following reaction?
Phytochrome occurs in two forms. In which form(s) does it promote the germination of seeds of some species?
Abortions are much riskier _____.
The amount of energy provided by fat is ____.
In which part of the excretory system of the human body urine is it stored before passing urine?
The sino-atrial node is the normal pacemaker of the human heart because:
Which of the following gases is primarily responsible for eutrophication of water bodies?