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tangare [24]
3 years ago
14

Why can you predict the base sequence of one strand in a molecule of DNA if you know the sequence of the other strand?

Biology
2 answers:
Hatshy [7]3 years ago
8 0
In DNA, each base pairs up with only
one other base
Leto [7]3 years ago
5 0

Answer:

Option A, In DNA, each base pairs up with only one other base.

Explanation:

DNA is made up of two complementary nucleotide (also referred to as base pairs). It is the purine which associates with the pyrimidine group.  

The four bases in DNA are  

• adenine (A) - a purine

• cytosine(C) - a pyrimidine

• guanine (G) - a purine

• thymine (T) - a pyrimidine

Adenine is complementary to thymine and cytosine is complementary to guanine . Thus, Adenine  forms complementary pair with thymine and cytosine forms complementary pair with guanine.

Hence, option A is correct.

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HAPPY NEW YEARS !!! CAN SOMEONE PLEASEEEE HELP ME WITH THIS SCIENCE QUESTION I WILL MARK YOU BRAINLIEST !!!
sp2606 [1]

Answer:

According to the image shown, the country that most closely resembles the population pyramid by age is the United States (option A).

Explanation:

The population pyramid consists of a bar chart that groups the population by age and sex. Each sex is separated into two columns, while from the base to the top the ages are grouped from lowest to highest.

The pyramid by age shown in the image corresponds to a developed country, such as the United States, since the distribution of the population of infants and young people is proportional, being more acute in the advanced ages, acquiring the shape of a bottle.

The "bottle" shape of the population pyramid indicates a controlled birth rate, as well as good availability of basic and sanitary resources, characteristic of a developed country like the United States.

The other options are not correct because:

<em>     C and D. In developing countries such as </em><u><em>Nigeria and Ethiopia</em></u><em>, the birth rate is high - forming a broad base - and the resources available are limited, so there is a progressive decrease as the age groups are distributed, giving a true pyramid shape. </em>

<em>     B. </em><u><em>Italy</em></u><em>, a European country, has a tendency to rhomboidal population pyramids. This is due to a predominance of adult, young and mature, population, low birth rate, good basic and sanitary resources.</em>

6 0
3 years ago
How do limiting factors affect the rate of photosynthesis?
Annette [7]

Answer:

Any change in the level of a limiting factor will affect the rate of reaction. If the level is too low or too high, the rate of photosynthesis declines rapidly.

Explanation:

5 0
2 years ago
What type of cell does meiosis start with?
bija089 [108]
Meiosis starts off with a diploid cell and then it makes four haploid cells.
3 0
3 years ago
"If the frequency of an allele in a population is 0.999, what is the expected frequency of homozygotes for this allele in a popu
IgorC [24]

Answer:

The answer to the question is

The expected frequency of homozygotes for the allele in a population at Hardy-Weinberg Equilibrium is 0.998

Explanation:

From the question, we have the frequency of an allele  =  0.999

By Hardy-Weinberg Equilibrium

p² + 2pq + q² = 1 and p + q = 1

p = dominant allele frequency  in the population

q = recessive allele frequency  in the population

p² = homozygous dominant individuals  percentage

q² = homozygous recessive individuals  percentage

2pq = heterozygous individuals percentage

Therefore the frequency of the homozygotes for the allele = 0.999² =  0.998001 ≅ 0.998 to three decimal places

The Hardy-Weinberg equilibrium states that the genetic disparity in a population will remain unchanged from generation to generation in the absence of evolutionary disturbing influences

4 0
3 years ago
If you dont see blood in the IV tubing or injection equipment, there is not no risk of cross comtamination is this statement tru
olya-2409 [2.1K]

False.

The equipment and tubing might have still been touched or used, even if there isn't blood inside. All equipment should be thoroughly cleaned before use, or if necessary, discarded.

7 0
3 years ago
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