Chromosomes are thread-like structures in which DNA is tightly packaged within the nucleus. DNA is coiled around proteins called histones, which provide the structural support. Chromosomes help ensure that DNA is replicated and distributed appropriately during cell division. Each chromosome has a ...
For instance, in human beings, the first chromosome (chromosome number 1) has been shown to be the biggest in size and is about three times bigger than the 22nd chromosome. As already mentioned, the chromosomes are made from the DNA molecule being tightly coiled and tightly packed. Here, ...
What are the monomers of DNA and RNA? Nucleotides: A nucleotide consists of 3 parts - a pentose sugar moiety (deoxyribose/ribose), a phosphate group, and a nitrogenous base (cytosine/guanine/adenine/thymine or uracil). The phosphate group is attached to the 5' carbon of the sugar by an ...
What are chromosomes made of, from DNA, RNA, and protein, or just DNA and RNA? (a) What is recombinant DNA technology (DNA cloning)? (b) Give an example of its use. What is the point at which DNA is being actively copied during replication called?
Emphasis is placed on what remains to be learned, particularly in light of reality of the sequencing of DNA which leaves the previous era of chromosome research as a prehistoric event. It is at this turning point, that well formulated questions can be asked about many of the chromosomes ...
But what, exactly, is DNA? What smaller elements make up this complex molecule, how are these elements arranged, and how is information extracted from them? This unit answers each of these questions, and it also provides a basic overview of the process of DNA discovery.Further...
In eukaryotic cells, DNA replication occurs during the S-phase of the cell cycle. During S-phase, RNA transcription and protein translation are largely limited to the production of histone mRNAs and proteins, thereby decreasing the likelihood that DNA polymerase will encounter RNA polymerase. In ...
A. The human genome contains approximately 3 to 3.2 billion of DNA base pairs, which reside in the 23 pairs of chromosomes within the nucleus of all our cells. B. Half of genome is from our father and half of that is from our mother. Every base pair of our genome can be traced back...
What are the basic units of chromosomes? A. Solenoid B. Super solenoid C. DNA D. Nucleosome 如何将EXCEL生成题库手机刷题 > 下载刷刷题APP,拍照搜索答疑 > 手机使用 分享 反馈 收藏 举报 参考答案: D 复制 纠错举一反三 第二次鸦片战争期间,侵国北方百万平方千米领土的是( ) A. 英国 ...
DNA is known as Deoxyribonucleic Acid. Itis an organic compound that has a unique molecular structure. It is found in allprokaryotic cells and eukaryotic cells. DNA Types There are three different DNA types: A-DNA:It is a right-handed double helix similar to the B-DNA form. Dehydrated DNA...