What is the name of anything that can cause an immune response it is usually a protein?
Any foreign material—usually of a complex nature and often a protein—that binds specifically to a receptor molecule made by lymphocytes is called an antigen.
Which statement concerning production of offspring is correct?
Therefore, the correct statement is “production of offspring is necessary for a species to survive, but it is not necessary for an individual to survive”.
Which species became extinct first?
With their penchant for hunting, habitat destruction and the release of invasive species, humans undid millions of years of evolution, and swiftly removed this bird from the face of the Earth. Since then, the dodo has nestled itself in our conscience as the first prominent example of human-driven extinction.
Which statement best explains why the transplanted skin is not rejected?
Why is the transplanted skin not rejected? The antigens of the replacement skin are the same as those of the damaged skin.
What best describes genetic material?
Genes are functional units of heredity and they are made of DNA that is packaged in components called chromosomes. In general, the genetic code specifies 20 standard amino acids that form proteins. Hence, the best statement describes genetic material is “D” and other given options are incorrect.
Which best describes the job of DNA?
The main role of DNA in the cell is the long-term storage of information. It is often compared to a blueprint, since it contains the instructions to construct other components of the cell, such as proteins and RNA molecules. To read the genetic code, cells make a copy of a stretch of DNA in the nucleic acid RNA.
What kind of bonds hold the 2 strands of DNA together?
Hydrogen bonds exist between the two strands and form between a base, from one strand and a base from the second strand in complementary pairing. These hydrogen bonds are individually weak but collectively quite strong.
Why do the single strands remain intact even though the Double Helix does not?
In other words, why do the single strands remain intact even though the double helix does not? The double helix is held together with hydrogen bonds, while the single strands are linked by phosphodiester bonds.
What bonds hold DNA backbone together?
Bases are held together by hydrogen bonds, and the DNA backbone is held together by phosphodiester bonds.
Why are weak hydrogen bonds important for DNA strands?
Weak bonds may be easily broken but they are very important because they help to determine and stabilize the shapes of biological molecules. Hydrogen bonds keep complementary strands of DNA together. Hydrogen bonds participate in enzymic catalysis.
Why is weak hydrogen bonding of water important?
Hydrogen bonding is important in many chemical processes. Hydrogen bonding is responsible for water’s unique solvent capabilities. Hydrogen bonds hold complementary strands of DNA together, and they are responsible for determining the three-dimensional structure of folded proteins including enzymes and antibodies.