Semi-Conservative DNA Replication DNA replication occurs in preparation for?mitosis, when a parent cell divides to produce two genetically identical daughter cells – as each daughter cell contains ...
DNA Structure The nucleic acid DNA is a?polynucleotide?– it is made up of?many nucleotides?bonded together in a?long chain A DNA nucleotide DNA molecules are made up of?two polynucleotide strands?l...
Nucleotide Structure Nucleic acids?such as?DNA?(deoxyribonucleic acid) and?RNA?(ribonucleic acid) are?macromolecules?(giant molecules) Like proteins (polypeptides) and carbohydrates (polysaccharide...
Mitosis in Root Tips: Observing & Drawing Growth in plants occurs in specific regions called?meristems The root tip meristem can be used to study?mitosis The root tip meristem can be found?just...
Mitosis: The Stages Mitosis is the process of nuclear division by which?two genetically identical daughter nuclei?are produced that are also genetically identical to the parent cell nucleus (they h...
How a Tumour Forms Cancers demonstrate how important it is that?cell division?is?precisely controlled, as cancers arise due to?uncontrolled mitosis Cancerous cells divide repeatedly and uncontrolla...
The Significance of Stem Cells A?stem cell?is a cell that can?divide?(by mitosis) an?unlimited number of times Each new cell (produced when a stem cell divides) has the potential to?remain a stem c...
The Significance of Telomeres The?ends?of the chromatids in chromosomes are ‘sealed’ with?protective structures?called?telomeres They are made of?non-coding DNA?(DNA that does not contain genes) th...
The Cell Cycle Mitosis?is part of a?precisely controlled process?known as the?cell cycle The cell cycle is the?regulated sequence of events?that occurs?between one cell division and the next The ce...
