The DNA of a fruit fly is arranged on five chromosomes. There are about 250 million base pairs in this DNA. There are 13,601 individual genes (reference). Each gene appears at a certain location on a certain chromosome, and there are two copies of the gene. The location of a particular...
When I was a young scientist, DNA had already been discovered. And scientists had found that DNA was full of genes. All proteins are coded by genes. What I wanted to understand was, how do the genes express themselves? And what about the proteins made by the genes? How does this happen?
How are genes transcribed in eukaryotes? Describe the structure and function of DNA. Is the DNA that is found in mitochondria the same as the DNA found in the nucleus? Explain any differences. DNA is the blueprint not only for the organism but for all the parts of the cell. How does ...
How are genes transcribed in eukaryotes? How do cells use the base sequence of a DNA molecule to produce a polypeptide? Describe how eukaryotic DNA is arranged in the cell. During DNA replication, how are the new nucleotides added to the template strand?
firms are now studying how genes interact, looking for correlations that might be used to determine the causes of disease or predict a drug's efficacy. 2012年考研真题(英语二)阅读理解 Section Ⅱ first two hours, now three hours一this is how far in advance authorities are recommending people ...
One of the main factors in evolution is that the genes themselves change by mutation. The actual heredity carrying parts of the chromosome are made from a substance known as DNA, an abbreviation for deoxyribose nucleic acid. In DNA, there are component parts that can be arranged in different ...
All genes are made up of stretches of these four bases (arranged in different ways and in different lengths). You can view a 3-D rotatable image of DNAhere... Photo: National Institute of Health A critical feature of DNA is the ability of the nucleotides to make specific pairs: . Adeni...
“stemness” are clearly arranged, and new primordia bud off the flanks of the meristem (shoot), or are produced by cells that pass through the meristem (root). The molecular architecture of the regulation underlying the shoot meristem type has been studied in great detail, and involves HD ...
A muscle fiber contains many myofibrils, which are cylinders of muscle proteins. These proteins allow a muscle cell to contract. Myofibrils contain two types of filaments that run along the long axis of the fiber, and these filaments are arranged in hexagonal patterns. There are thick and thin...
How are rRNA genes organized in higher eukaryotes? How many rRNA genes are there per cell? Why? How do we believe that the sequences of the individual genes are kept virtually identical? How are the 3' and 5' of a DNA molecule differe...