No, tracheids do not have a nucleus. Tracheids are long, dignified dead cells found in the xylem of the vascular plants. These are typically... View Article
Algae are considered protists, plant-like protists. These are a large, diverse group of simple plant-like entities, as they photosynthesize. They... View Article
In dicotyledons, more stomata are present on the lower surface of the leaf. It is also known as a dorsiventral leaf. Monocotyledons have stomata... View Article
Chlorophyll is required to capture energy from the sun and perform photosynthesis. Chlorophyll pigment absorbs light at a specific wavelength.... View Article
All plants have chlorophyll to capture energy from the sun and make food by photosynthesis. Plants that are not green also contain chlorophyll,... View Article
Epistasis is an interaction between genes. An epistatic gene determines the phenotypic expression of another trait. E.g. Skin colour is... View Article
Replication is important to maintain genetic continuity. DNA duplicates and then equally gets distributed to daughter cells during the cell... View Article
Okazaki fragments are formed at the time of replication due to discontinuous replication of lagging strands. They are joined by DNA ligase.... View Article
Okazaki fragments are the short sequences of deoxyribonucleotides, which are formed at the lagging strand during replication. These fragments are... View Article
The 3’ end of DNA has a terminal hydroxyl (OH) group at the 3rd carbon of the deoxyribose sugar. Further reading: DNA Polymerase Chromosome... View Article
It is important to maintain the integrity of the genome so any error occurred during replication has to be corrected. Replication errors are... View Article
Primase is a type of RNA polymerase enzyme that synthesises a short RNA primer for DNA replication. It initiates the process of DNA replication.... View Article
Primase is required for the primer formation and to start the replication process by DNA polymerase. If primase is absent, DNA polymerase cannot... View Article
Most of the prokaryotes have a single origin of replication but the rate of replication is very high. The rate of replication in E.coli is ~1000... View Article
The rate of replication in eukaryotes is ~50 nucleotides per second. Replication in eukaryotes occurs bidirectionally from many origins.... View Article
The main function of DNA helicase is to separate two strands of DNA for replication. DNA polymerase is the main enzyme that polymerises the DNA... View Article
Telomerase is an enzyme, which adds TTAGGG repeats to the telomeres and gives them stability and reverses telomere shortening. Telomeres are the... View Article
