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True or false, rotational symmetry is the quality a design has if it maintains all characteristics when it is rotated about a point

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True or false, rotational symmetry is the quality a design has if it maintains all characteristics when it is rotated about a point

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What best explains why the sun maintains its size and shape?

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What best explains why the sun maintains its size and shape?

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Which Enlightment philosopher introduced the idea that people enter a social contract with the purpose of maintains order in society?

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Which Enlightment philosopher introduced the idea that people enter a social contract with the purpose of maintains order in society?

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Which statement BEST describes a lifestyle with healthy eating habits? A. John and his family follow a diet plan that consists of healthy foods. If they begin to gain weight, they eat only protein until their weight drops to where they want it to be. B. Shannon and Shandra watch their weight carefully. They eat diets with no fat or sweets. Because of their plan, they stay very thin. C. Andrew is a wrestler and needs to stay at a consistent weight. In order to do so, he follows the dietary recommendations of a dietician carefully and always maintains a balanced diet. D. Maria and her brother Jose are obsessed with their appearance. In order to maintain a super-skinny look, Maria eats a low-calorie, no-fat, high-protein diet. In order to stay bulked up, Jose eats all protein and fats.

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Which statement BEST describes a lifestyle with healthy eating habits? A. John and his family follow a diet plan that consists of healthy foods. If they begin to gain weight, they eat only protein until their weight drops to where they want it to be. B. Shannon and Shandra watch their weight carefully. They eat diets with no fat or sweets. Because of their plan, they stay very thin. C. Andrew is a wrestler and needs to stay at a consistent weight. In order to do so, he follows the dietary recommendations of a dietician carefully and always maintains a balanced diet. D. Maria and her brother Jose are obsessed with their appearance. In order to maintain a super-skinny look, Maria eats a low-calorie, no-fat, high-protein diet. In order to stay bulked up, Jose eats all protein and fats.

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The protein that maintains proper proportion and concentration of water in blood is

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Answer:

Helicases unwind the two parental DNA’s strands and creates the replication fork; single strand binding proteins keep the single strand from joining.


Further information:

• DNA replication: a biological method occurring in all living organisms that is the basis for biological inheritance

Helicase: It is an enzyme that may unwinds the DNA helix ahead of the replication machinery.

Origin of replication: a specific sequence in a genome at which replication is started.


Steps of DNA replication:

• During initiation, proteins fix to the source of replication while helicase unwinds the DNA helix and two replication forks are formed at the source of replication.

• During elongation, a primer sequence is added with complementary RNA nucleotides, which are then substituted by DNA nucleotides.

• During elongation the leading strand is made constantly, while the lagging strand is made in portions called Okazaki fragments.

• During termination, primers are detached and substituted with new DNA nucleotides and the backbone is stuck down by DNA ligase.

Purpose of DNA replication:

The purpose of DNA replication is to produce two duplicate copies of a DNA molecule. This is essential for cell division during development or repair of damaged tissues. DNA replication ensures that each new cell receives its own replica of the DNA.

Answer details:

Subject: Biology

Level: High school

Keywords:

• DNA replication

• Helicase

• Origin of replication

• Steps of DNA replication

Learn more to evaluate:

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A car initially moving at 9 m/s begins accelerating at its maximum acceleration of 4 m/s2. if the car maintains this acceleration, how much time will it take to cover 200 m?

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Answer:

a) The time the police officer required to reach the motorist was 15 s.

b) The speed of the officer at the moment she overtakes the motorist is 30 m/s

c) The total distance traveled by the officer was 225 m.

Explanation:

The equations for the position and velocity of an object moving in a straight line are as follows:

x = x0 + v0 · t + 1/2 · a · t²

v = v0 + a · t

Where:

x = position at time t

x0 = initial position

v0 = initial velocity

t = time

a = acceleration

v = velocity at time t

a)When the officer reaches the motorist, the position of the motorist is the same as the position of the officer:

x motorist = x officer

Using the equation for the position:

x motirist = x0 + v · t (since a = 0).

x officer = x0 + v0 · t + 1/2 · a · t²

Let´s place our frame of reference at the point where the officer starts following the motorist so that x0 = 0 for both:

x motorist = x officer

x0 + v · t = x0 + v0 · t + 1/2 · a · t²      (the officer starts form rest, then, v0 = 0)

v · t = 1/2 · a · t²    

Solving for t:

2 v/a = t

t = 2 · 15.0 m/s/ 2.00 m/s² = 15 s

The time the police officer required to reach the motorist was 15 s.

b) Now, we can calculate the speed of the officer using the time calculated in a) and the  equation for velocity:

v = v0 + a · t

v = 0 m/s + 2.00 m/s² · 15 s

v = 30 m/s

The speed of the officer at the moment she overtakes the motorist is 30 m/s

c) Using the equation for the position, we can find the traveled distance in 15 s:

x = x0 + v0 · t + 1/2 · a · t²

x = 1/2 · 2.00 m/s² · (15s)² = 225 m

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Which statement BEST describes a lifestyle with healthy eating habits? A. John and his family follow a diet plan that consists of healthy foods. If they begin to gain weight, they eat only protein until their weight drops to where they want it to be. B. Shannon and Shandra watch their weight carefully. They eat diets with no fat or sweets. Because of their plan, they stay very thin. C. Andrew is a wrestler and needs to stay at a consistent weight. In order to do so, he follows the dietary recommendations of a dietician carefully and always maintains a balanced diet. D. Maria and her brother Jose are obsessed with their appearance. In order to maintain a super-skinny look, Maria eats a low-calorie, no-fat, high-protein diet. In order to stay bulked up, Jose eats all protein and fats.

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1. The answer is “C”.

“Identical twins” who have been raised apart are typically more similar in intelligence level than biological siblings raised together because they have been born with the same genetic code.

Identical twins originate from a single fertilized egg that parts into two. Before it parts, it is either male or female. After it parts, there are either two guys or two females. The two sections of the fertilized egg embed in the uterus and every create one of the twins.  

Identical twins have the equivalent hereditary source. No immediate reason for monozygotic twinning has been resolved; it isn’t innate. Monozygotic twins speak to around 33% all things considered. They may look strikingly comparative, and it might be hard to reveal to them separated.

2. The answer is “A”.

Lawrence Kohlberg felt that one of the only ways individuals will accomplish the objectives in each of his six stages was to participate in “consensus democracy” in small group settings.

Lawrence Kohlberg felt that the best way to support development through these stages was by discourse of good problems and by investment in consensus democracy inside small groups. Consensus democracy was rule by understanding of the gathering, not larger part rule. This would invigorate and widen the reasoning of youngsters and grown-ups, enabling them to advance starting with one phase then onto the next.

3. The answer is “D.  showing a learner how to correct common mistakes”.

The term scaffolding alludes to a procedure in which instructors display or exhibit how to take care of an issue, and afterward venture back, offering support as required. Analyst and instructional architect Jerome Bruner first utilized the term ‘scaffolding’ in this setting, harking back to the 1960s. The hypothesis is that when understudies are given the help they require while discovering some new information, they stand a superior possibility of utilizing that learning freely. Bruner suggests positive association and three methods of portrayal amid educating: activities, pictures, and dialect.  

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A motorist drives along a straight road at a constant speed of 15.0 m/s. Just as she passes a parked motorcycle police offi cer, the offi cer starts to accelerate at 2.00 m/s2 to overtake her. Assuming that the offi cer maintains this acceleration, (a) determine the time interval required for the police offi cer to reach the motorist. Find (b) the speed and (c) the total displacement of the offi cer as he overtakes the motorist.

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Answer:

a) The time the police officer required to reach the motorist was 15 s.

b) The speed of the officer at the moment she overtakes the motorist is 30 m/s

c) The total distance traveled by the officer was 225 m.

Explanation:

The equations for the position and velocity of an object moving in a straight line are as follows:

x = x0 + v0 · t + 1/2 · a · t²

v = v0 + a · t

Where:

x = position at time t

x0 = initial position

v0 = initial velocity

t = time

a = acceleration

v = velocity at time t

a)When the officer reaches the motorist, the position of the motorist is the same as the position of the officer:

x motorist = x officer

Using the equation for the position:

x motirist = x0 + v · t (since a = 0).

x officer = x0 + v0 · t + 1/2 · a · t²

Let´s place our frame of reference at the point where the officer starts following the motorist so that x0 = 0 for both:

x motorist = x officer

x0 + v · t = x0 + v0 · t + 1/2 · a · t²      (the officer starts form rest, then, v0 = 0)

v · t = 1/2 · a · t²    

Solving for t:

2 v/a = t

t = 2 · 15.0 m/s/ 2.00 m/s² = 15 s

The time the police officer required to reach the motorist was 15 s.

b) Now, we can calculate the speed of the officer using the time calculated in a) and the  equation for velocity:

v = v0 + a · t

v = 0 m/s + 2.00 m/s² · 15 s

v = 30 m/s

The speed of the officer at the moment she overtakes the motorist is 30 m/s

c) Using the equation for the position, we can find the traveled distance in 15 s:

x = x0 + v0 · t + 1/2 · a · t²

x = 1/2 · 2.00 m/s² · (15s)² = 225 m

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Which statement BEST describes a lifestyle with healthy eating habits? A. John and his family follow a diet plan that consists of healthy foods. If they begin to gain weight, they eat only protein until their weight drops to where they want it to be. B. Shannon and Shandra watch their weight carefully. They eat diets with no fat or sweets. Because of their plan, they stay very thin. C. Andrew is a wrestler and needs to stay at a consistent weight. In order to do so, he follows the dietary recommendations of a dietician carefully and always maintains a balanced diet. D. Maria and her brother Jose are obsessed with their appearance. In order to maintain a super-skinny look, Maria eats a low-calorie, no-fat, high-protein diet. In order to stay bulked up, Jose eats all protein and fats.

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1. The answer is “C”.

“Identical twins” who have been raised apart are typically more similar in intelligence level than biological siblings raised together because they have been born with the same genetic code.

Identical twins originate from a single fertilized egg that parts into two. Before it parts, it is either male or female. After it parts, there are either two guys or two females. The two sections of the fertilized egg embed in the uterus and every create one of the twins.  

Identical twins have the equivalent hereditary source. No immediate reason for monozygotic twinning has been resolved; it isn’t innate. Monozygotic twins speak to around 33% all things considered. They may look strikingly comparative, and it might be hard to reveal to them separated.

2. The answer is “A”.

Lawrence Kohlberg felt that one of the only ways individuals will accomplish the objectives in each of his six stages was to participate in “consensus democracy” in small group settings.

Lawrence Kohlberg felt that the best way to support development through these stages was by discourse of good problems and by investment in consensus democracy inside small groups. Consensus democracy was rule by understanding of the gathering, not larger part rule. This would invigorate and widen the reasoning of youngsters and grown-ups, enabling them to advance starting with one phase then onto the next.

3. The answer is “D.  showing a learner how to correct common mistakes”.

The term scaffolding alludes to a procedure in which instructors display or exhibit how to take care of an issue, and afterward venture back, offering support as required. Analyst and instructional architect Jerome Bruner first utilized the term ‘scaffolding’ in this setting, harking back to the 1960s. The hypothesis is that when understudies are given the help they require while discovering some new information, they stand a superior possibility of utilizing that learning freely. Bruner suggests positive association and three methods of portrayal amid educating: activities, pictures, and dialect.  

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A device that initiates and maintains a controlled nuclear fission chain reaction to produce energy for electricity is a a. geothermal nuclear apparatus. b. nuclear combustion chamber. c. nuclear reactor. d. nuclear electric engine. e. electrical fusion device

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Refer to the figure shown below.

Charge q₁ = 0.5 nC = 0.5×10⁻⁹ C
Charge q₂ = 8 nC = 8×10⁻⁹ C
d = 1.2 m, the distance between the two charges.

x is the distance between the two charges, measured from the charge q₁.

From Coulomb’s Law,
The electric field generated along x by q₁ is
E₁ = k(q₁/x²)
The electric field generated along x by q₂ is
E₂ = -k[q₂/(d-x)²]
where
k = 8.988×10⁹ (N-m²)/C² is the Coulomb constant/

When the electric field along x is zero, then
E₁ + E₂ = 0
k[q₁/x² – q₂/(d-x)²] = 0

That is,
0.5/x² = 8/(1.2 – x)²
8x² = 0.5(1.2 – x)²
16x² = 1.44 – 2.4x + x²
15x² + 2.4x – 1.44 = 0

Solve with the quadratic formula.
x = (1/30)*[-2.4 +/- √(5.76 + 86.4)]
   = 0.24 or -0.4 m

Reject the negative answer to obtain
x = 0.24 m
d-x = 0.96 m

Answer
The electric field is zero between the charges so that
(a) It is at 0.24 m from the 0.5 nC charge, and
(b) It is at 0.96 m from the 8 nC charge.

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Sally wonders how much of a role genetics plays in determining her weight. she has heard about a gene, called ob, that codes for a protein that maintains homeostasis by regulating food intake and energy expenditure in response to adipose tissue. what is the name of the protein?

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1. The right answer is polymerization.

Polymerization refers to the chemical reaction or process by which small molecules (eg hydrocarbons of two to ten carbon atoms) react with one another to form molecules of higher molecular weights. The initial molecules may be monomers or prepolymers; synthesis leads to polymers.

2. The right answer is hydrolysis.

Hydrolysis is a chemical reaction in which a covalent bond is broken by the action of a molecule of water.

For organic substances such as proteins, hydrolysis is equivalent to the cleavage of the peptide bonds between the different amino acids that constitute them.

Amino acids are cleaved by enzymes. So is the hydrolysis of starch or amylolysis, used in breweries or generally in the food industry to obtain glucose syrup.

3. The right answer is polymer.

The term polymer denotes a molecule of high molecular mass generally organic or semi-organic. A macromolecule consisting of a sequence of a large number of repeating units, one or more monomers, united to each other by covalent bonds.

Thus starch or proteins are polymers, just as silk or wood are made of polymers. Thermoplastics, thermosets and elastomers are also among the polymers. And polymer matrices are widely used in composite materials.

4. The right answer is lipid.

Lipids are the fat of living things. They are hydrophobic or amphiphilic molecules – hydrophilic molecules having a hydrophilic domain – very diversified, including among others fats, waxes, sterols, fat-soluble vitamins, mono-, di- and triglycerides, or even phospholipids.

5. The right answer is carbohydrate.

Carbohydrates are a class of organic compounds containing a carbonyl group (aldehyde or ketone) and at least two hydroxyl groups (-OH). Included in this class are substances derived from monosaccharides by reduction of the carbonyl group, by oxidation of at least one functional group at the end of the carboxylic acid chain or by replacement of one or more hydroxyl groups by an atom of hydrogen, an amino group, a thiol group or any similar atom.

6. The right answer is nucleic acid.

Nucleic acids are macromolecules, that is, relatively large, relatively complex molecules. They enter the family of biomolecules since they are of great importance in the realm of life, “bios” meaning life in Greek.

Nucleic acids are polymers whose base unit, or monomer, is the nucleotide. These nucleotides are linked by phosphodiester bonds.

7. The right answer is protein.

Proteins are fundamental materials of living matter. Most of our food contains it. From the biochemical point of view, these are large molecules made of chains of varying length of amino acids. All proteins, whether of bacterial, plant or animal origin, consist of a group of 20 amino acids.

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