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Nata [24]
3 years ago
12

Indicate whether the following statements are true or false.

Biology
1 answer:
Neporo4naja [7]3 years ago
3 0

Answer:

1) True

2) True

3) False

4) True

Explanation:

1) True. Nucleotides are the monomers of the polymeric chain. DNA is formed by two complementary polymeric strands.

2) True. Each DNA strand has a polarity or directionality and it is determined by the direction that nucleotides are pointing. Each nucleotide will have a 5' end phosphate on one side and a 3' hydroxyl end on the other. One strand will have 5'-3' direction and the complementary strand 3'-5'.

3) False. There are four different nucleotides that can be incorporated into a DNA strand, these are: Cytosine, Guanine, Adenine and Thymine.

4) True. Hydrogen bonds between Cytosine-Guanine (C-G) and Adenine-Thymine (A-T) in different strands hold the complementary DNA chains together.

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Answer:

Lungs supply oxygen carried by blood to cells of the body. The cells which are responsible for the transportation of oxygen is hemoglobin. When oxygen rich hemoglobin reaches a cell so the oxygen is unloaded and carbondioxide which is produced as a waste product is loaded in hemoglobin. Again this hemoglobin goes to the lungs and dispose carbondioxide there and repeat the process again.

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I need a Hashtag relating to the cell wall
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2 years ago
changes in blood pressure, heart rate, and blood profile in mares during the last 3 months of gestation and the peripartum perio
Scrat [10]

Warmblood mares that were pregnant (n = 10) had their peripartum alterations in blood pressure, heart rate, complete blood count, plasma electrolyte concentrations, and heart rate variability (HRV) assessed.

<h3>What is Gestation ?</h3>

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<h3>What is peripartum period ?</h3>

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Everyone agrees that the postpartum period starts when the baby is born. Although the end is less well defined, it is sometimes thought to occur six to eight weeks after delivery because by then the effects of pregnancy on many systems have essentially gone back to their pre-pregnancy states.

To know more about Gestation please click here : brainly.com/question/14927815

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8 0
2 years ago
A patient has severe acne that has been refractory to treatment. The patient is taking tetracycline and using topical tretinoin
Degger [83]

Answer:

The correct answer is option c. "Tetracycline must be discontinued before beginning the isotretinoin".

Explanation:

Isotretinoin is a medication used to treat cases of severe acne, having dramatic positive effects since the patients start the treatment. However, the use isotretinoin should be monitored by a doctor because it is hard to process and could cause renal side effects. In this case, the patient must discontinue its treatment with tetracycline before start using isotretinoin.

7 0
3 years ago
Is a crayfish a producer, primary, secondary, or tertiary consumer?
Lisa [10]
Well, cray fish are omnivorous which means they eat animals too. Secondary consumers eat animals.

Cray fish are secondary consumers.
6 0
3 years ago
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