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Which of the following organelles, is located near the nucleus and contain a collection of flattened membrane bound cisternae ?
Out of peroxisomes, lysosomes and mitochondria, single membrane covering occurs in
Sugar is extracted from sugarcane and also from the crops of
Which of the following is present in maximum amount in atmosphere?
Occurrence of higher number of endemic species in South America and Australia is due to
Which is sequenced during study of phylogeny?
DNA is the genetic material that carries genetic information regarding corresponding amino acid sequence of proteins. Accumulation of differences in their genomes parallels divergent evolution of species, while conservation of DNA sequences leads to convergent evolution. The more recent the divergence of two species from a common ancestor, the more preserved sequences of DNA and amino acids should be. Synthesis of RNA using the DNA template strand is referred to as transcription. The primary transcript, the original product of transcription, is then processed into different types of RNA. Thus, sequence of DNA strand determines the nucleotide sequence of RNA. Therefore, molecular systematics studies DNA sequence to decipher the phylogenetic relationship between different organisms.
The Ti plasmid is often used for making transgenic plants. This plasmid is found in
Khorana et al synthesised RNA with copolymer of UGUGUGUGUG... It produced a peptide with alternate cysteine and valine. The codons for the two are
Cells of immune system that cause pore formation in the antigen are
In sickle cell anaemia, death occurs when lethal genes are present in
Blood of AB group cannot be given to B group patient because
Parasite plants e.g. Viscum absorb water and minerals from host by
In which one of the following pathogens do the cells of promycelium after the germination of teleutospore produce infection hyphae instead of basidiospores?
Which ones produce androgenic haploids in anther cultures
The undesirable sounds, which disturb our environment, are called
Ultraviolet radiations from sunlight causes a reaction that produces
The menstrual cycle can be divided into three continuous phases. Starting from the first day of the cycle, the correct order is
Weismann cut off tails of mice generation after generation but tails neither disappeared nor shortened showing that
Increasing the levels of aldosterone in the blood would result in
increasing aldosterone means that more sodium ultimately winds up in the blood, activating thirst mechanisms which increases ECF(extracellular fluid) volume and therefore increases blood pressure. (if you raise blood volume, you raise blood pressure)