DNA, or deoxyribonucleic acid, is the hereditary material in humans and almost all other organisms. Nearly every cell in a person's body has the same DNA
DNA sequencing refers to the general laboratory technique for determining the exact sequence of nucleotides, or bases, in a DNA molecule
5' AAATGTCCATGC 3'
3' -TTACAGGTACG -5' is the sequence and polarity of the dna strand complementary to the strand 5' aaatgtccatgc 3'.
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The antigen-binding sites of an antibody molecule are formed from the molecule's variable regions which are described as so because their amino acid sequences can be different on different antibodies.
The specificity of antibodies is determined by the variable regions found at their endpoints. Antibodies are specialized proteins secreted by B-cells of the immune system. They are also called immunoglobulins. They contain four polypeptide chains that comprise two heavy chains and two light chains to form a Y-shaped molecule.
The variable regions, more specifically the hypervariable regions of an antibody, have a high ratio of different amino acids with the most common amino acids provided in one place. The variable region serves as the antigen-binding site while the constant region found below the variable region is determined to invade the antigen.
Antibodies are preserved in our body to identify the antigen the next time it encounters. They send the signals to the other body parts to reject the antigen and invade it.
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For humans, we have 19,000 protein-coding genomes. For every gene, there are 2 alleles. This means that humans have 38,000 alleles (19,000×2=38,000).
Answer:
Transcription of gene A is not affected
Explanation:
A transcriptional repressor is a DNA/RNA-binding protein that acts to suppress gene expression and/or protein synthesis by binding to target sequences. Moreover, a silencer is a DNA region that binds to particular transcriptional repressors in order to suppress gene expression. In this case, the transcriptional repressor is activated by binding to an effector molecule X (e.g., another protein). In consequence, and since the activated repressor-X complex is not more able to bind the silencer of gene A, it is expected that such complex will not be able to affect transcription of the target gene.
Answer:
The correct answer is :
- The 2 strands of DNA separate
- mRNA is built based on the DNA template
- tRNA brings an amino acid into the P site.
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tRNA brings an amino acid into the A site.
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tRNA leaves the P site and a peptide bond is formed between the amino acids.
- The mRNA+attached tRNA shifts, moving the 6-tRNA from A site to the P site.
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The entire mRNA strand is translated into amino acids and a polypeptide is formed.
Explanation:
Protein synthesis is a process that is made up of two distinct processes namely transcription and translation.
Transcription: this process include several steps where the segment of DNA which has information, copied into the new molecule called mRNA which acts as the template as it has information copied from the DNA to produce gene expression.
Translation: is the process includes several steps in which a peptide chain is formed from the mRNA with the help of tRNA and ribosomes.
The correct order of steps is given under the answer heading.
