Biology questions
20584 published questions with worked solutions.
- In contrast to annelids the platyhelminths show :
- Using imprints from a plate with complete medium and carrying bacterial colonies, you can select streptomycin resistant mutants...
- Haemophilia is more commonly seen in human males than in human females because :
- A woman with 47 chromosomes due to three copies of chromosome 21 is characterized by :
- In order to find out the different types of gametes produced by a pea plant having the genotype AaBb, it should be crossed to a...
- Secretin and cholecystokinin are digestive hormones. They are secreted in :
- Which of the following unicellular organism has a macro-nucleus for trophic function and one or more micro-nuclei for...
- AIDS is caused by HIV that principally infects :
- According to widely accepted "fluid mosaic model" cell membranes are semi-fluid, where lipids and integral proteins can diffuse...
- A person is undergoing prolonged fasting. His urine will be found to contain abnormal quantities of :
- Why is vivipary an undesirable character for annual crop plants ?
- Bacillus thuringiensis (Bt) strains have been used for designing novel :
- Photosynthetic Active Radiation (PAR) has the following range of wavelengths :
- Golden rice is a transgenic crop of the future with the following improved trait :
- Consider the following statements about cactus : 1. The leaves are reduced to spines. 2. The stem does the photosynthesis. Which...
- In which one of the following, methanogens, i.e., methane producing bacteria are not present ?
- Malarial parasite is a
- With reference to biodiversity, which of the following statements is/are correct ? 1. Species richness and high degree of...
- It is difficult to kill viruses because they
- The genetic material of bacteria is found in