List of top Biology Questions

Given below are two statements:
Statement I : Bt toxins are insect group specific and coded by a gene cry IAc. 
Statement II : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic pH of the insect gut. 
In the light of the above statements, choose the correct answer from the options given below:

Which of the following causes typhoid fever?

Given below are some stages of human evolution. Arrange them in correct sequence. (Past to Recent)
A. Homo habilis 
B. Homo sapiens 
C. Homo neanderthalensis 
D. Homo erectus
Choose the correct sequence of human evolution from the options given below:

Phenylketonuria is caused by:

Which of the following diseases is a result of protein deficiency?

Given below are two statements:
Statement I: Mitochondria and chloroplasts both double membranes bound organelles. 
Statement II: Inner membrane of mitochondria is relatively less permeable, as compared chloroplast. I
In the light of the above statements, choose the mis appropriate answer from the options given below

Which hormone is NOT produced by the Islets of Langerhans in the pancreas?

Which disease is characterized by symptoms such as dehydration, excessive loss of water in urine, and absence of glucose in the urine?

Which hormones stimulate the production of pancreatic juice and bicarbonate?

From where does the female gametophyte not develop?

Who coined the term 'root pressure theory'?

The annual net primary productivity of the biosphere is approximately:

Which of the following is not present in RNA?

Match the type of adaptation given in List-I with their examples given in List-II. Select the option showing correct combination

List-I (Types of adaptation)		List-II (Examples)
1	Biochemical adaptation	p	Desert lizards
2	Behavioural adaptation	q	Deep sea fishes
3	Physiological adaptation	r	Opuntia
4	Morphological adaptation	s	Kangaroo rats

The sequence of communities of primary succession in water is:
(A) Phytoplanktons → Scrubs → Free floating hydrophytes → Rooted hydrophytes → Grasses → Trees.
(B) Phytoplanktons → Free floating hydrophytes → Rooted hydrophytes → Trees → Scrubs.
(C) Free floating hydrophytes → Scrubs → Phytoplanktons → Rooted hydrophytes → Grasses → Trees.
(D) Phytoplanktons → Rooted hydrophytes → Free floating hydrophytes → Reed swamps → Marsh meadows → Scrubs → Trees.

Who discovered DNA?

Which of the following best describes sympatric speciation?

Between which among the following, the relationship is not an example of common symbiosis?

The natural reservoir of phosphorus is:

Which of these enzymes is required to cleave a plasmid?