How many DNA bases are in each codon? a. three b. sixteen c. four d. twenty e. sixty-four If methionine comes as an intermediate amino acid in protein synthesis, the codon which codes it is: ___ How many bases are present on a strand of mRNA with 25 c...
What is the number of nitrogenous bases needed to code for a specific amino acid? If each nucleotide codes for a specific amino acid, how many different amino acids could be used to produce proteins? a. four b. eight c. twelve d. sixteen How many nucleotides are in DNA? What is an ...
How many codons and how many DNA bases do you have the part of the gene that encodes the enzyme uricase? Codons: Codons are triplets of nucleotides which code for one amino acid. There are also codons which signal ribosome to start translation (start ...
模拟题性恐惧2岁左右的幼儿，随着想象的发展，出现模拟题性恐惧，如怕黑、怕狼、怕坏人等。这些和想象相联系的恐惧情绪往往是由环境影响而形成。与此同时，由于语言在幼儿心理发展中作用的增加，可以通过成人讲解来帮助幼儿克服这种恐惧。【考点二十五】婴幼儿依恋的发展阶段【考点模拟题】婴儿在( )个月时进入了...
How many genes does the Human Genome contain? The Human Genome Project has revealed that there are probably about 20,000-25,000 'haploid' protein coding genes. The completed human sequence can now identify their locations. But only about 1.5% of the genome codes for proteins, while the rest...
How many amino acids are common to all living systems? Amino Acids: The building blocks of all proteins are amino acids. Amino acids have three basic parts to their structure. An amine group, a carboxylic acid group and the R group which is used to classify the amino acid. ...
Many of them live freely there. Some of the gentler ones, such as goats, sheep, geese, and deer, walk among the visitors who come to see them. Others are kept in large closed-in areas almost like their natural homes. All the animals there get care and love.1. Before 1977, the ...
To determine how many nucleotides are found in one spiral of B-DNA, we can follow these steps:1. Understand B-DNA Structure: - B-DNA is a double helical structure composed of two strands that wind around each other. Each st
There are only four DNA bases, but there are 20 amino acids that can be used for proteins. So, groups of three nucleotides form a codon that specifies which of the 20 amino acids goes into the protein. A 3-base codon yields 64 possible patterns (4*4*4), which is more than enough ...
L. How many drug targets are there? Nature Rev. Drug Discov. 5, 993–996 (2006). Article CAS Google Scholar Williams, M. Systems and integrative biology as alternative guises for pharmacology: prime time for an iPharm concept? Biochem. Pharmacol. 70, 1707–1716 (2005). Article CAS ...