All categories

3 years ago

Which of the following statements about minerals is FALSE?

Biology

2 answers:

Hatshy [7]3 years ago

4 0

Answer:

b. They can be destroyed by cooking.

Explanation:

Minerals are inorganic elements that always maintain their chemical structure. The minerals are not destroyed or altered by heat, oxygen or acids.

Iron, for example, can be temporarily combined with other elements forming salts, but it is still iron.

Julli [10]3 years ago

3 0

Answer:

D)They cannot be broken down by digestion.

Explanation:

Actually, it is required by digestion to broke down and get to the minimum expression of all the nutrients, vitamins and minerals ingested in order to be absorbed, and this way nourishes all the human body.

All these nutrients are acquired directly from the food we ingest, the digestion starts to break them down into different components of vitamins and minerals, after that the nutrients are reduced drastically into little particles, once are in this state, the body can absorb and use them for energy, growing, cells reparation, etc.

Once the minerals and vitamins are broken down, divided and reduced into their minimum expression, different special processes convert these nutrients into diverse components as:

- Proteins chemically decompose nutrients (minerals included) into amino acids.

-The fat its chemically decomposed into glycerol and fatty acids.

-The carbs (some of them with mineral composition) are chemically decomposed into simple sugars

You might be interested in

Question 1

Kruka [31]

1) Mitochondrial cristae increases the surface area for more ATPase enzymes to increase energy production.

2) Mitochondria are more similar to prokaryotic cells.

3) Eukaryotic cells are more complex.

Mitochondria are the cellular organelles in eukaryotic cells that generate energy needed to carry out the cell's biochemical reactions through a process called cellular respiration. The main substrate used to carry out cellular respiration is glucose, a carbohydrate. The energy generated is stored in a molecule called adenosine triphosphate (ATP).

The mitochondrion has an outer membrane that is permeable to ions, metabolites and polypeptides. It also has its own genetic material, which differs from the genetic material of the nucleus and is independent of it. The enzyme ATP synthase is a transmembrane enzyme that catalyzes the synthesis of ATP from ADP, a phosphate group and energy supplied by a flow of protons (H+). The proton flux occurs between the intermembrane space and the mitochondrial matrix. This occurs during cellular respiration, and this particular process is called oxidative phosphorylation.

1) The mitochondrial cristae are the folds of the inner membrane of the mitochondrion. They contain several embedded proteins, including ATP synthase, used to produce energy. This arrangement generates a larger surface area available for chemical reactions to take place within the mitochondrion and therefore ensures good performance during cellular respiration. As electrons move along the electron transport chain in the inner membrane, energy is released which is used to pump hydrogen ions into the intermembrane space creating an electrochemical gradient. This gradient creates a potential energy called proton motive force in the inner mitochondrial membrane. The result is that chemiosmosis occurs, generating ATP from ADP when ATP synthase takes up the potential energy of the concentration gradient formed by the H+ ions. So, if the inner membrane were simple, smooth and unfolded, there would not be so much space to locate the ATP synthase enzymes and generate so much energy. Consider that mitochondria are found in eukaryotic cells, which are complex and have a high energy requirement. With a folded inner membrane, more room is ensured for more enzymes to produce all the energy needed.

2) Mitochondria are very similar to prokaryotes because:

Contain closed circular double-stranded DNA
They have 70S ribosomes (eukaryotic cells have 80S ribosomes)
They are similar in size
They divide by binary fission.

It is believed that the ancestor of mitochondria was a bacterium (prokaryote) that was ingested by another single-celled organism. The bacterium provided an advantage to its host because these primitive mitochondria supplied it with hydrogen to produce energy. It is also believed that when atmospheric oxygen increased at that time, the anaerobic cells used the bacteria to eliminate the gas, which was toxic to them.

3) Eukaryotic cells have a much more complex organizational model than prokaryotic cells. Their size is much larger and the cytoplasm has a set of cellular structures that fulfill various functions (organelles). The main distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. Another important difference is the structure of the DNA. Eukaryotic DNA consists of multiple, linear, double-stranded DNA molecules with proteins called histones, whereas that of prokaryotes is double-stranded and circular.

So, mitochondria are the organelles in eukaryotic cells that generate energy needed through a process called cellular respiration. The mitochondrial cristae are the folds of the inner membrane of the mitochondrion. They contain several embedded proteins, including ATP synthase, used to produce energy. This arrangement generates a larger surface area available for chemical reactions to take place within the mitochondrion and therefore ensures good performance during cellular respiration. if the inner membrane were simple, smooth and unfolded, there would not be so much space to locate the ATP synthase enzymes and generate so much energy.

Mitochondria are very similar to prokaryotes because they are similar in size, contain similar type of DNA and ribosomes and divide by binary fission. On the other hand, eukaryotic cells have a much more complex organizational model than prokaryotic cells because rheir size is much larger and in the cytoplasm has different types of organelles including membrane-bound organelles such as the nucleus and a mitochondrion.

Learn more about mitochondria here: brainly.com/question/18599093

8 0

3 years ago

Which of the following is UNTRUE about nuclear fusions?

dusya [7]

Hi Brainiac

The untrue is : it only occurs in very large heavy atoms.

I hope that's help:)

7 0

3 years ago

1. Place a check mark next to each cellular structure necessary to build a bacterial cell.

kow [346]

Answer:

Plasma Membrane

Nucleus

Mitochondrion

Golgi Apparatus

Smooth Endoplasmic Reticulum

Rough endoplasmic reticulum

I hope this help

Explanation:

7 0

3 years ago

In the picture below, a ray of light hits a surface and changes direction. What is this action called?

satela [25.4K]

This action is called reflection.

6 0

2 years ago

MULTIPLE CHOICE HELP PLS IVE BEEN STUCK ON THIS FOR 1 HOUR

siniylev [52]

Answer:

It's one of the last ones at the bottom.

Explanation:

By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion. ... Atoms that gain extra electrons become negatively charged. The'res the explanation just pick the answer from the last two from this explanation.

5 0

3 years ago