Concept explainers
Interpretation:
The correct reason should be determined for the given statement; does a single base-pair substitution in a strand of DNA always result in a new amino acids in the protein coded for by that gene.
Concept Introduction:
A base is nitrogen containing heterocyclic compound which is found in DNA and RNA.
Gene is the biological unit of heredity which holds the information to build and maintain their cells and pass genetic traits to offspring. In cells, a gene is a portion of DNA.
Amino acids are the molecules which containing an
Amino acids are the basic structural building units of protein and other
Central dogma in molecular biology is,
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FUND. GEN. ORG&BIO CHEM PKG
- If the genetic code uses triplets, how many different amino acids can be coded by a repeating RNA polymer composed of UA and UC (UAUCUAUCUAUC ...)? a. one b. two c. three d. four e. fivearrow_forwardWhy do you think nucleic acids were originally not considered to be carriers of genetic information?arrow_forwardWhen the human genome sequence was finally completed, scientists were surprised to discover that the genome contains far fewer genes than expected. How many genes are present in the human genome? Scientists have also found that there are many more different kinds of proteins in human cells than there are different genes in the genome. How can this be explained?arrow_forward
- If an extra nucleotide is inserted in the first exon of the beta globin gene, what effect will it have on the amino acid sequence of the globin polypeptides? Will the globin most likely be fully functional, partly functional, or nonfunctional? Why?arrow_forwardIf the genetic code used 4 bases at a time, how many amino acids could be encoded?arrow_forwardDoes changing the sequence of nucleotides always result in a different amino acid sequence? Explainarrow_forward
- Is it possible to have a mutation in nucleotide four that would produce the same amino acid? If yes provide an example.arrow_forwardThe genetic code uses three bases to encode one amino acid. Why can't the code use only two bases to encode each amino acid?arrow_forwardWhy is Dna twisted ?arrow_forward
- How do you know how many amino acids are coded for a section of DNA?arrow_forwardTwo highly negatively charged complementary strands of DNA come together to form a double helix. What prevents them from repelling each other?arrow_forwardWhat happens when one nucleotide pair is lost from themiddle of the coding sequence of a gene?arrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning