Answer:
The correct answers are option A. "Mutating histidine residue 274 of the citrate synthase enzyme to an alanine amino acid would likely eliminate or reduce the enzymatic activity of citrate synthase", B. "The histidine residue would hydrogen bond to acetyl-CoA throughout the reaction mechanism, stabilizing the enolate intermediate", and D. "Oxaloacetate would be repulsed from aspartic acid in the first step of the reaction mechanism".
Explanation:
Citrate cycle is comprised of a series of reactions used in aerobic organisms to release energy from different chemical species. In this cycle, the citrate synthase enzyme catalyzes the first reaction which is the formation of citrate by the condensation of acetyl-CoA and oxaloacetate. The enzymatic activity depends on the histidine residue 274, which acts as proton donor to the carbonyl oxygen of acetyl CoA stabilizing the enolate intermediate of citrate. Therefore, a mutating histidine residue 274 of the citrate synthase enzyme to an alanine amino acid would likely eliminate or reduce the enzymatic activity of citrate synthase, also oxaloacetate would be repulsed from aspartic acid in the first step of the reaction mechanism as a result of this modification.
Answer:
Zooplankton help other populations survive by keeping out other herbivores
Explanation:
This is because a keystone species are species that have large effect on the the habitat and through its effect they help to keep the ecosystem in existence. They make sure that the ecosystem exist. They help populations survive by keeping out herbivores and feeding on the algae. They help drive nutrients cycle and transfer energy from algae to invasive fish.
Answer:
yo busqué todas y al parecer todas son correctas a si que.....
Answer:
Tropical rain forests grow around the equator in South America, Africa, and Southeast Asia, The temperature is stable year-round, around 27°C (60° Fahrenheit). As you can tell from the name, it rains a lot in these forests. Most tropical forests receive at least 200 cm (80 inches) of rain in a year. Tropical forests generally have a rainy and dry season. Temperate forests occur in the next latitude ring, in North America, northeastern Asia, and Europe, temperature ranges from -30 to 30°C (-22 to 86 F) and the forests receive 75-150 cm (30-60 in) of precipitation per year,
Explanation:
Answer:
d is the answer
Explanation:
In cell biology, mitosis is a part of the cell cycle in which replicated chromosomes are separated into two new nuclei. Cell division gives rise to genetically identical cells in which the total number of chromosomes is maintained. In general, mitosis (division of the nucleus) is preceded by the S stage of interphase (during which the DNA is replicated) and is often followed by telophase and cytokinesis; which divides the cytoplasm, organelles and cell membrane of one cell into two new cells containing roughly equal shares of these cellular components. The different stages of Mitosis all together define the mitotic (M) phase of an animal cell cycle—the division of the mother cell into two daughter cells genetically identical to each other.
