What appears as a dark side to telomerase activity with regard to human health?
What appears to be a dark side to telomerase activity with regard to human health? Telomerase is active in most cancer cells. The cell can be transformed to a cancerous cell.
Which of the following types of cells typically displays little or no telomerase activity?
genetics test 2
| Question | Answer |
|---|---|
| Which of the following types of cells typically displays little or no telomerase activity? | Differentient somataic cells |
| Which of the following reagents is not required for the polymerase chain reaction? | Dideoxynucleotide triphosphates |
What is the difference between a nucleotide and a nucleoside quizlet?
What is the difference between a nucleotide and a nucleoside? A nucleotide contains a sugar, nitrogenous base and phosphate group; whereas a nucleoside is just a sugar and nitrogenous base. When a phosphate group of a nucleotide is removed by hydrolysis, the structure remaining is nucleoside.
What’s the difference between a nucleotide and a nucleoside?
The main difference lies in their molecular composition as Nucleosides contain only sugar and a base whereas Nucleotides contain sugar, base and a phosphate group as well. A nucleotide is what occurs before RNA and DNA, while the nucleoside occurs before the nucleotide itself.
Why does a DNA strand grow only in the 5ʹ to 3ʹ direction?
Question: 12. Why Does A DNA Strand Grow Only In The 5′ To 3′ Direction? A. Because DNA Polymerases Can Only Add Nucleotides To The 3′ End Of The Growing Molecule.
What are examples of nucleotide?
Examples of nucleotides with only one phosphate group:
- adenosine monophosphate (AMP)
- guanosine monophosphate (GMP)
- cytidine monophosphate (CMP)
- uridine monophosphate (UMP)
- cyclic adenosine monophosphate (cAMP)
- cyclic guanosine monophosphate (cGMP)
- cyclic cytidine monophosphate (cCMP)
- cyclic uridine monophosphate (cUMP)
What are the two types of nucleotides?
Because there are four naturally occurring nitrogenous bases, there are four different types of DNA nucleotides: adenine (A), thymine (T), guanine (G), and cytosine (C).
What are the 5 types of nucleotides?
The five bases are adenine, guanine, cytosine, thymine, and uracil, which have the symbols A, G, C, T, and U, respectively. The name of the base is generally used as the name of the nucleotide, although this is technically incorrect.
What 3 things make up a nucleotide?
A nucleotide consists of a sugar molecule (either ribose in RNA or deoxyribose in DNA) attached to a phosphate group and a nitrogen-containing base. The bases used in DNA are adenine (A), cytosine (C), guanine (G), and thymine (T).
What is the base of DNA?
Each strand has a backbone made of alternating sugar (deoxyribose) and phosphate groups. Attached to each sugar is one of four bases–adenine (A), cytosine (C), guanine (G), or thymine (T).
What are the two pyrimidines?
Cytosine and thymine are the two major pyrimidine bases in DNA and base pair (see Watson–Crick Pairing) with guanine and adenine (see Purine Bases), respectively. In RNA, uracil replaces thymine and base pairs with adenine.
What’s the difference between purines and pyrimidines?
They are nitrogenous bases that make up the two different nucleotides in DNA and RNA. Purines (adenine and guanine) are two-carbon nitrogen ring bases while pyrimidines (cytosine and thymine) are one-carbon nitrogen ring bases.
What are the examples of pyrimidines?
Pyrimidines include cytosine, thymine, and uracil whereas purines include adenine and guanine. These five nitrogenous bases are regarded as primary or canonical since they are the fundamental units of the genetic code
What 2 bases are purines?
Nitrogenous bases present in the DNA can be grouped into two categories: purines (Adenine (A) and Guanine (G)), and pyrimidine (Cytosine (C) and Thymine (T)).
What foods are considered purines?
Foods that contain high levels of purines include:
- wild game, such as veal, venison, and duck.
- red meat.
- some seafood, including tuna, sardines, anchovies, herring, mussels, codfish, scallops, trout, and haddock.
- organ meat, such as liver, kidneys, and thymus glands, which are known as sweetbreads.
What is the difference between protein and purine?
Purines are nitrogen-containing compounds that come directly from the food that we eat or from the catabolism (breakdown) of nucleic acids in the body. They have a different chemical structure than proteins. However, for the most part, high-purine foods are also high-protein foods