List of top Biology Questions

Pick out the appropriate association representing brood parasitism ______.
Name the part of gynoecium that determines the compatibility of pollen grains.
Given below are two statements:
Statement I: In a scrubber, exhaust from the thermal plant is passed through the electric wires to charge the dust particles.
Statement II: Particular matter (PM 2.5) can not be removed by scrubber but can be removed by an electrostatic precipitator.
In the light of the above statements, choose the most appropriate answer from the options given below: 
Which of the following statements is not true?
Select the incorrect statement regarding synapses:
Which one of the following statements is correct?

Match list I with list II:

 List - I List - II
(a)Bronchioles(i)Dense Regular Connective Tissue
(b)Goblet Cell(ii)Loose Connective Tissue
(c)Tendons(iii)Glandular Tissue
(d)Adipose Tissue(iv)Ciliated Epithelium
Which of the following is not a desirable feature of a cloning vector?
Ten E. coli cells with 15N- dsDNA are incubated in a medium containing 14N nucleotides. After 60 minutes, how many E. coli cells will have DNA totally free from 15N?
Select the incorrect statement with respect to acquired immunity:

Which of the following are not the effects of Parathyroid hormone?

  1. Stimulates the process of bone resorption,
  2. Decreases Ca2+ level in blood,
  3. Reabsorption of Ca2+ by renal tubules,
  4. Decreases the absorption of Ca2+ from digested food,
  5. Increases metabolism of carbohydrates.

Choose the most appropriate answer from the options given below

Match list I with list II with respect to methods of contraception and their respective actions. Choose the correct answer from the options given below:

 List - I List - II
(a)Diaphragms(i)Inhibit ovulation and Implantation
(b)Contraception(ii)Increase phagocytosis of sperm within Pills Uterus
(c)Intrauterine Devices(iii)Absences of Menstrual cycle and ovulation following partition
(d)Lactational Amenorrhea(iv)They cover the cervix blocking the entry of sperms

Match list I with list II. Choose the correct answer from the options given below:

 List - I List - II
(a)Glycogen(i)Hormone
(b)Globulin(ii)Biocatalyst
(c)Steroids(iii)Antibody
(d)Thrombin(iv)Storage product
The recombination frequency between the genes a & c is 5%, b & c is 15%, b & d is 9%, a & b is 20%, c & d is 24% and a & d is 29%. What will be the sequence of these genes on a linear chromosome?

Statements related to human insulin are given below: Which statement(s) is/are correct about genetically engineered Insulin?

  1. Pro-hormone insulin contain extra stretch of C-peptide
  2. A peptide and B-peptide chains of insulin were produced separately in E. coli, extracted and combined by creating a disulphide bond between them.
  3. Insulin used for treating Diabetes was extracted from Cattles and Pigs.
  4. Pro-hormone insulin needs to be processed for converting into a mature and functional hormone.
  5. Some patients develop allergic reactions to the foreign insulin.

Choose the most appropriate answer from the options given below:

Which of the following is a correct statement?
Given below are two statements:
Statement I: Restriction endonucleases recognise specific sequences to cut DNA known as palindromic nucleotide sequences.
Statement II: Restriction endonucleases cut the DNA strand a little away from the centre of the palindromic site.
In the light of the above statements, choose the most appropriate answer from the options given below: 
If ‘8’ Drosophila in a laboratory population of ‘80’ died during a week, the death rate in the population is__ individuals per Drosophila per week.
Which of the following functions is not performed by secretions from salivary glands?
Lippes loop is a type of contraceptive used as:
At which stage of life the oogenesis process is initiated?
In gene therapy of Adenosine Deaminase (ADA) deficiency, the patient requires periodic infusion of genetically engineered lymphocytes because:
Given below are two statements:
Statement I: Autoimmune disorder is a condition where the body defense mechanism recognizes its own cells as foreign bodies.
Statement II: Rheumatoid arthritis is a condition where the body does not attack self cells.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?

  1. It results in the formation of haploid gametes
  2. Differentiation of gamete occurs after the completion of meiosis
  3. Meiosis occurs continuously in a mitotically dividing stem cell population
  4. It is controlled by the Luteinizing hormone (LH) and Follicle Stimulating Hormone (FSH) secreted by the anterior pituitary
  5. It is initiated at puberty

Choose the most appropriate answer from the options given below:

In an E. coli strain the i gene gets mutated and its product can not bind the inducer molecule. If the growth medium is provided with lactose, what will be the outcome?