Which description best explains Watson and Crick's DNA model? DNA is a single–stranded molecule that has nitrogenous bases toward its exterior. DNA is a double helix made of two strands linked together with hydrogen bonds. DNA is a double helix that contains nitrogenous bases toward its exterior.

Answers

Answer 1
Answer: The discoverers of DNA were not JamesD Watson and Francis Crick. They are the first scientist to formulate anaccurate description of the DNA’s (deoxyribonucleic acid) complex ,double-helical structure. They discovered that base pairing nucleotides mustbe; adenine and thymine; and cytosine and guanine. These base pairs are heldtogether by a hydrogen bond, atype of chemical reaction that s easy to breakand easy to reform. The statement is “DNAis a double helix made of two strands linked together with hydrogenbonds.”

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Choose the smallest of the following units:Group of answer choices
Mm
cm
m
kM

Answers

The smallest unit among the options is mm(Millimeters). Thus, option a) is the answer.

The smallest unit among the options is "a) mm," which stands for millimeter. It's a metric unit of length that is one-thousandth of a meter (1/1000). Millimeters are commonly used for precise measurements, especially in fields like engineering, science, and manufacturing, where accuracy is crucial.

Centimeters (cm) are larger than millimeters, with one centimeter being equal to 10 millimeters. Meters (m) are even larger, being the base unit of length in the metric system. Kilometers (km) are the largest unit among the options, equivalent to 1000 meters.

In summary, when comparing the given options, millimeters are the smallest unit of length, followed by centimeters, meters, and then kilometers, with each subsequent unit being larger by factors of 10.

The correct option is : a) mm.

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Answer:

The the smallest unit among the options provided is mm (millimetre).

Explanation:

mm (millimetre) is a metric unit of length equal to one-thousandth (1/1000) of a metre.


cm (centimetre) is equal to one-hundredth(1/100) of a metre. It is a subunit of length is the SI Sytem. It is used to measure small lengths.


m (metre) is the distance that light travels in vaccum in 1/299792458 seconds. It is the fundamental building block in metric system and is universally accepted.


km (kilometre) is equal to 1000 metres. It is commonly used to measure longer distances.


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Which two body system were most actively involved in this experiment

Answers

if you could give me a little more information about this experiment i could help you...

Which component is affected when a catalyst is added to a chemical reaction? the amount of substrate the activation energy the amount of product the concentration of reactants

Answers

The right answer is the activation energy.

The catalyst increases the reaction rate by introducing new reaction paths (mechanism), and lowering its activation energy, or activation Gibbs free energy. By doing this it can increase the speed, or lower the temperature of the reaction. It is important to note that the catalyst does not alter the total Gibbs free energy of the reaction which is a system state function and therefore has no effect on the equilibrium constant.

Answer : The correct option is, the activation energy

Explanation :

Activation energy : Activation energy is defined as the minimum amount of energy absorbed by the reactant molecules so that their energy becomes equal to the threshold energy.

During the chemical reaction, the reactants react to form product. When a catalyst is added to a chemical reaction then the reaction becomes faster that means the rate of reaction increases and the activation energy decreases.

In the given diagram, 'G' is the activation energy without catalyst and 'H' is the activation energy with catalyst.

The energy diagram is shown below.

If an animal cell shrinks it was probably placed in a

Answers

Answer:

Hypertonic solution

Explanation:

A solution with higher solute concentration is called as hypertonic solution while the one with less solute concentration is termed as hypotonic solution. Osmotic movement of water occurs from hypotonic to hypertonic solution to balance the concentration of solution. When an animal cell is placed in a hypertonic solution, it loses water through osmosis and shrinks.

An animal cell will shrink if it is placed in a saline/ salty solution (hypertonic solution). The salt will absorb the water from the cell through osmosis.

Used fuel assemblies are typically considered _______. a. low-level waste b. uranium mill tailing c. high-level waste d. all of the above

Answers

Answer: c. high-level waste

Explanation:

The used or spent fuel comes from the nuclear reactor that can be no longer efficient to be used again for the purpose of generating electricity, because the efficiency to conduct fission reaction by such fuel is low. But still it may be thermally hot, highly radioactive and harmful. It comes under the category of high level wastes. The high level wastes are those wastes that are produced as a byproduct of the nuclear reactors.

Answer:

High-Level waste

Explanation:

I just took the test !

Which of the following is not an example of self-management?knowing first aid

wearing your seatbelt

riding your bicycle without a helmet


practicing food-safety skills

Answers

riding your bicycle without a helmet.