List of top Biology Questions

What are some archaeological sites where Neanderthal remains and artifacts have been discovered?
A Thermal Cycler/Stabilizer is used for .........?
Statement 1: Avery, McLeod, and McCarty discovered the semi-conservative nature of DNA.
Statement 2: Meselson and Stahl used \( \text{E. coli} \) to demonstrate the semi-conservative nature of DNA.
How much ATP is produced by aerobic respiration?
What is the role of heme in hemoglobin?
How many heartbeats does a person have in 1 minute on average?
Which are the pioneer species in aquatic habitats?
Which part of a plant is grafted onto a stock that is rooted?
The mitral valve is also known as ?
Menstrual blood does not clot due to the presence of ?
Total genetic content of an organism is called
How many ATP molecules are needed as an initial investment in the glycolytic cycle (normal glycolysis)?
Which disease is primarily spread by female Anopheles mosquitoes?
(b) Explain the process of transcription in prokaryotes. How is it different from transcription in eukaryotes?
(a) Work out a dihybrid cross up to F2 generation between pea plants bearing violet-colored axial flowers and white-colored terminal flowers using Punnett’s square. Give their F2 phenotypic ratio. State the Mendel’s law of inheritance that was derived from such a cross.
(iv) Why is insertional inactivation preferred over the use of selectable markers in cloning vectors?
(iii) A cloning vector does not have a selectable marker. How will it affect the process of cloning?
(ii) State the role of ‘rop’ gene.
(a) Draw a schematic diagram of the cloning vector pBR322 and label (1) Bam HI site (2) gene for ampicillin resistance (3) ‘ori’ (4) ‘rop’ gene.
(ii) Endosperm development precedes embryo development. Justify.
(b) (i) With the help of a labeled diagram, show the different stages of embryo development in a dicot plant.
(b) In a human female, probability of an ovum to get fertilized by more than one sperm is impossible. Give reason.
(a) Draw a diagram of a human sperm. Label any four parts and write their functions.

(c) Name a species of mosquito other than female Anopheles and the disease, for which it carries the pathogen. 
 

(b) Explain the events which occur within a female Anopheles mosquito after it has sucked blood from a malaria patient.