Protein folding is determined by a variety of factors, from the amino acid composition all the way through to primary, secondary and tertiary structures of the proteins. Proteins fold in water environments, and how they fold is determined by the hydrophobicity, hydrophilicity and charge of amino acids. Amino acids that are hydrophobic will face away from water environments, while hydrophilic amino acids will face towards water environments. This gives rise to primary and secondary structures such as alpha-helices and beta-sheets. Among these are a variety of structures that form the tertiary structures. The different types of amino acids play an essential role in this, as they are the building blocks of proteins and can affect the structures of proteins because of their charge and affinity for water.
According to the usda food guide, someone who needs 2000 kcal/day should consume 3 cup(s) of milk or the equivalent in milk products each day.
<h3>What is the USDA food intake pattern?</h3>
The USDA Food Patterns were created to assist people in following Dietary Guidelines recommendations. They recommend daily amounts of nutrient-dense foods from five major food groups and their subgroups. The patterns also allow for oils and set a maximum number of calories available for other uses, such as added sugars, solid fats, added refined starches, or alcohol. The USDA has developed three Food Patterns to allow for flexibility in meeting Dietary Guidelines recommendations: the Healthy U.S.-Style Pattern, the Healthy Vegetarian Pattern, and the Healthy Mediterranean-Style Pattern.
The documents below show the recommended amounts and limits in the three USDA Food Patterns at 12 calorie levels ranging from 1,000 to 3,200 calories.
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Answer:
B. Viruses must commandeer the mechanisms of a host cell in order to reproduce
Explanation:
Virus is an organism that is incapable of replicating on its own without infecting a living host cell. A viral cell is dependent on a living host to replicate and express its genes. Hence, the infection cycle of a virus is its reproductive life cycle.
Other living organisms e.g plant, bacteria, fungi etc. have the ability to reproduce i.e. multiply on their own through asexual or sexual means. However, on the contrary, a virus must infect a living host, hijack the replicational abilities of the host cell in order to reproduce. Based on this, a virus employs a lysogenic or lytic cycle or both on its host to reproduce.