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3 years ago

What faulty protein is made in sickle cell anemia?

2 answers:

4 0

The mutation in the HBB gene in sickle cell anemia changes one of the amino acids, the building blocks of proteins, in the beta chain of hemoglobin. This defect causes the hemoglobin protein to stick together and form stiff fibers. These fibers distort the shape of the red blood cells and make them more fragile.

ale4655 [162]3 years ago

3 0

Answer:

a genetic disease

Explanation:

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Explain why soil is classified as a heterogeneous mixture.

marta [7]

Answer:

All natural soils are heterogeneous mixtures because no two nature soil samples will have the precise proportions of its inherent components.

Explanation:

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2 years ago

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Food is taken in and broken down by the _______ system. The raw materials are then transported throughout the body by the ______

stepan [7]

The answer is B. Digestive and cardiovascular

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2 years ago

Question 4

Juliette [100K]

Answer:

In eukaryotes, thousands of chemical reactions are able to take place in separate compartments called organelles.

Explanation:

Organelles are specific cellular structures that are the means of compartmentalizing the various functions that occur within cells.

Examples of organelles and their functions are:

- Nucleus: contains DNA and in it occur the replication of this molecule and its transcription into RNA.

- Rough endoplasmic reticulum: protein synthesis and conjugation of these molecules occurs.

- Mitochondrion: houses all oxidative phosphorylation reactions and the electron transport chain for ATP synthesis to occur.

The organelles are then the structures that allow the development of the multiple functions that a cell has.

The other options are not correct because:

Bacteria is a prokaryotic organism.
Prokaryote refers to simple organisms that lack organelles.
Proteins are biomolecules that allow the structure and function of living beings.

8 0

2 years ago

In the scientific method, questioning does which of the following?

zysi [14]

Answer:

defines the problem to be explored

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2 years ago

3. A population of 820 insects lives in a 1.2-acre area. They gather nectar from a

katen-ka-za [31]

Answer:

The plants have the higher population density. This is because, when compared with that of the insects, the number of plant species per acre area is higher; 2800 compared to 683.3

Explanation:

The number of individual species per unit area of land is known as the population density. Population density describes how crowded or spaced out a given species is in a particular area. The higher the population density, the more crowded the species are and vice versa. The formula for calculating population density is given as:

Population density = Number of species/land area

Population density of the insects = 820/1.2 = 683.3 insects/acre

Population density of the plants = 560/0.2 = 2800 plants/acre

Therefore, the plants have the higher population density.

This is because, when compared with that of the insects, the number of plant species per acre area is higher.

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2 years ago