List of top Biology Questions

The part of plasmid that codes for proteins involved in the replication of the pBR322 plasmid is
Read the following statements and select the correct option. Statement-I: Biocontrol refers to the use of biological methods for controlling plant diseases and pests. Statement-II: Trichoderma species are effective biocontrol agents for several plant pathogens.

Match the contents of List-I with List-II

 

Match the column-I with column-II. Choose the correct option given below.


 

Malignant malaria is caused by
The drug prescribed to the patients who have undergone organ transplant is ____ and is produced by ____.
Which of the following are the techniques for detection of cancer of internal organs?
a) Radiography, MRI
b) MRI, computed tomography
c) Widal test, radiography
d) MRI, widal test
Which of the following is an example of homologous structures that provide evidence for evolution?
Which organelle in a eukaryotic cell is primarily responsible for synthesizing proteins destined for secretion?
In a cross between a pea plant heterozygous for round seeds (Rr) and a plant with wrinkled seeds (rr), what is the expected phenotypic ratio of the offspring?
In flowering plants, which structure develops into the fruit after fertilization?
Which of the following microorganisms is used in the production of curd from milk?
In the human heart, which chamber receives oxygenated blood from the lungs?
In flowering plants, the process of double fertilization results in the formation of which two structures?
In recombinant DNA technology, which enzyme is used to cut DNA at specific recognition sites to produce restriction fragments?
In plants, which of the following hormones is primarily responsible for promoting cell elongation in stems?
Which of the following is a pioneer species in the primary succession of a bare rock?
Which part of the human nephron is primarily responsible for the reabsorption of glucose and amino acids?
In a DNA molecule, if the percentage of adenine (A) is 30\%, what is the percentage of cytosine (C)?
In a dihybrid cross between two heterozygous pea plants (RrYy × RrYy), what is the phenotypic ratio of the offspring for seed shape and seed color? (R = round, r = wrinkled; Y = yellow, y = green)
Which of the following is the primary site of gaseous exchange in the human respiratory system?
In a population of plants, the allele for red flowers (R) is dominant over the allele for white flowers (r). If 36\% of the population has white flowers, what is the frequency of the recessive allele (r) in the population?
In DNA replication, which enzyme is responsible for unwinding the double helix and separating the DNA strands?
Which of the following hormones is secreted by the anterior pituitary gland and stimulates the thyroid gland to release thyroxine?
A man with blood group AB marries a woman with blood group O. What is the probability that their child will have blood group A?