Biology questions
20584 published questions with worked solutions.
- In recent years, DNA sequences (nucleotide sequence) of mt-DNA and Y chromosomes were considered for the study of human...
- Industrial melanism is an example of : -
- In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional...
- Darwin in his 'Natural Selection Theory' did not believe in any role of which one of the following in organic evolution : -
- Which one of the following describes correctly the homologous structures : -
- Ommatidia serve the purpose of photoreception in : -
- Sycon belongs to a group of animals, which are best described as : -
- During translation initiation in prokaryotes, a GTP molecule is needed in : -
- In the genetic code dictionary, how many codons are used to code for all the 20 essential amino acids : -
- The linkage map of X-chromosome of fruitfly has 66 units, with yellow body gene (y) at one end and bobbed hair (b) gene at the...
- Systemic heart refers to : -
- What used to be described as Nissel granules in a nerve cell are now identified as : -
- Chromosomes in a bacterial cell can be 1–3 in number and : -
- Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is...
- The genes controlling the seven pea characters studied by Mendel are now known to be located on how many different chromosomes : -
- Which one of the following traits of garden pea studied by Mendel was a recessive feature : -
- Which one of the following conditions though harmful in itself, is also a potential saviour from a mosquito borne infectious...
- Pattern baldness, moustaches and beard in human males are examples of : -
- Degeneration of a genetic code is attributed to the : -
- When a cluster of genes show linkage behaviour they : -