Answer:
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Explanation:
Organism characteristics are influenced by the amino acid sequences of proteins coded by their DNA. Amino acids vary in chemistry and structure thereby causing variation in protein structure and function. Similarities in sequences can infer close evolutionary relationships.
The characteristics of an organism are fundamentally determined by the amino acid sequences of its proteins. Protein sequences, composed of the 20 common amino acids, are coded by the DNA molecule in the cell. Therefore, the sequence of a DNA molecule plays a significant role in understanding an organism's identity and function.
Different amino acids have different chemistries and structural constraints, thus causing enormous variation in protein structure and function. This variety is responsible for the diversity and complexity of life. For instance, the human cytochrome c protein contains 104 amino acids, but when compared to the same protein in different organisms, only 37 of these amino acids appear in the same position. This suggests these organisms are descended from a common ancestor.
Moreover, the 3-dimensional structure of proteins, determined by the amino acid sequence, contains significant information about evolutionary relationships. These relationships can be inferred from variations over time of the nucleotide sequence of a gene. The more similar these sequences are in two organisms, the more closely related they are.
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Phase 2, a plateau phase, is the longest phase. It is unique among excitable cells and marks the phase of calcium entry into the cell. Phase 3 is the phase of rapid repolarization that restores the membrane potential to its resting value.
Answer:
Metaphase
Explanation:
Metaphase is the phase of mitosis that starts with complete disintegration of nuclear envelop. It is marked by attachment of spindle fibers to the kinetochores of chromosomes and movement of chromosomes to the middle of the cell, that is, equator. Chromosomes are aligned along center of the cell through spindle fibres .
Erwin Chargaff
Rosalind Franklin
Friedrich Miescher
Answer:
C. Rosland Franklin
Explanation:
edge 2023
Answer:
It is involved in the process of conjugation-exchange of genetic material between two bacteria
Explanation:
Conjugation is one of the ways by which bacteria exchange their genetic material (horizontal gene transfer). Two bacterial cells must physically connect in order to perform the conjugation. The linking occurs through a pilus.
Pilus is an appendage on the surface of bacteria cell and it is also called fimbria. Pilus is filamentous, tubular and composed of oligomeric proteins-pilin.
Donor cell contain pilus that will attach to the recipient bacterial cell and induce the transfer.
Answer:
Yeah! Those are correct!
Answer:
i think they are correct. i dont know about the fish tho
Explanation: