Why is very little sodium (200 mg) required in the diet for a sedentary individual?

Which of the following facts supports the argument that a pregnant cow should be fed more in its last trimester?

Radda [10]

Answer:

Three-Quarters of all growth occurs during the third trimester.

Explanation:

D is the only option that has anything to do with the last trimester which is what the question was asking about. Furthermore, because so much growth is occurring during this time the cow will need more food to support this growth. So, D is the best option.

8 0

3 years ago

A major function of serous membranes is to decrease friction. True or False

FromTheMoon [43]

Answer:

True

Explanation:

Serous membranes are found around organs to lubricate them and reduce friction

6 0

3 years ago

"Now that you have come up with an equation that describes the relationship between amounts of different nucleotide bases in DNA

Dima020 [189]

Answer:

G - 21%

T - 29%

A - 29%

Explanation:

Nucleotide bases in DNA are complementary. Adenosine (A) binds to Thymine (T) while Cytosine (C) binds to Guanine (G). Hence the composition of A in DNA is the same as that of T; and that of C is the same as that of G.

From the information given, C is 21%

Therefore G is also 21% of the genome as C is bound to G, the therefore are the same proportion.

C and G make up 42% of the genome (that 21% + 21%).

The remaining 58% (100%-42%) is made up of A + T

Similarly the proportion of A is equal to that of T,

Hence A is 29% (half of 58%) and T is 29%.

4 0

3 years ago

Read 2 more answers

During replication, nucleotide bases are added to DNA strands in a ___ direction(s).

Alborosie

Nucleotide bases are added to DNA strands in a 5' to 3' direction.

What is DNA replication?

When a cell divides, DNA copies itself through a process called replication.

Generally speaking, DNA replication involves uncoiling the helix, strand separation by rupturing the hydrogen bonds between the complementary strands, and synthesis of two new strands through complimentary base pairing.
The origin of replication, which is a precise location in the DNA, is where replication starts.
From the point of origin, DNA replication is bidirectional.
The two parent DNA strands unwind and split apart at the origin of replication to generate two "Y-shaped" replication forks in order to start DNA replication.
These unwinding enzymes are known as DNA helicases.
The real location of DNA copying is at these replication forks.
Proteins that destabilize helices bind to the single-stranded areas to prevent the two strands from rejoining.
To reduce stress on the helical molecule during replication, enzymes known as topoisomerases cause breaks in the DNA and then reunite them.
The hydrogen bonding of free DNA nucleotides with those on each parent strand results in the formation of new complementary strands as the strands continue to unwind and split in both directions around the entire DNA molecule.
The new nucleotides are joined by DNA polymerases using phosphodiester bonds as they align themselves opposite each parent strand using hydrogen bonds.
Deoxynucleotide triphosphates, which are made up of a nitrogenous base called deoxyribose and three phosphates, are the actual nucleotides that are aligning through complementary base pairing.
Two of the phosphates are withdrawn to provide energy for bonding as the phosphodiester bond forms between the 3' OH of the previous nucleotide in the DNA strand and the 5' phosphate group of the next nucleotide.
In the end, two identical DNA molecules are created when each parent strand acts as a template for the synthesis of a complementary copy of itself.

Hence, nucleotide bases are added to DNA strands in a 5' to 3' direction.

To learn more about DNA replication click on the link

brainly.com/question/21265857

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3 0

1 year ago

A patient comes to you with a "PUS" sample and asks you to isolate & identify the Staphylococcus aureus form this sample the

Irina-Kira [14]

Answer: Staphylococcus aureus can be isolated from the pus sample through the following steps:

--> Step 1: Describe the appearance of the specimen

--> Step 2: Examine the specimen microscopically

--> Step 3: Culture and report your observations.

--> Step 4: Biochemical testing

Explanation: Staphylococcus aureus are gram positive cocci bacteria that can be isolated from pus samples.Pus samples, which may come from wounds, abscess, burns or sinuses, are the type of samples which do not contain microorganisms and should not contain contaminants providing an aseptic collection technique and sterile container are used.

Staphylococcus aureus can be isolated from the pus sample through the following steps:

--> Step 1: White, yellow, brown, red, or black granules of varying size, shape, and consistency may be found in pus draining from

sinuses while describing the appearance of the pus sample.

--> Step 2: Here the specimen is examined microscopically after being stained with a staining technique called Gram staining. This step is done before culture to know the type of medium to use after gram positive cocci is microscopically seen.

--> Step 3: there are different cultures media that can be used to inoculate and culture a pus specimen. Since we are to isolate staphylococcus aureus, a selective and differential media known as Mannitol salt agar (MSA) is used. The presence of yellow colonies with yellow zone after incubation at 37°C indicate the presence of Staphylococcus aureus or species. There for the last confirmation test known as biochemical test is done.

--> Biochemical test: This is a chemical test that is done to identify a particular bacteria. For staphylococcus aureus, COAGULASE test is used to identify staphylococcus aureus which produces COAGULASE enzyme. A positive COAGULASE test is an indication of the presence of staphylococcus aureus as the bacterium isolate of the specimen.

7 0

3 years ago