the first option is correct (true).
the greater the surface area of an object the greater the buoyant force.
Answer:
This is false so option 2 (F)
Explanation:
On edge 2021 it even says false.
A
Carbon can form compounds of many sizes and shapes.
B
Animals need carbon in order to breathe.
C
Plants use carbon to absorb water into their roots.
D
Carbon is the most abundant element on Earth.
The correct answer A
This is in part due to carbon's ability to readily form bonds with other atoms, giving flexibility to the form and function that biomolecules can take, such as DNA and RNA, which are essential for the defining characteristics of life
Answer:
D
Explanation:
Our DNA, RNA, proteins, and something else I forget are all made of carbon. As a result, carbon is essentially one of the reasons we exist. Carbon can form connections with other atoms as well. Carbon makes up the majority of organisms.
I'm sorry if this is wrong
a. neutron. c. proton.
b. ion. d. electron.
2. Two or more different atoms are combined in
definite proportions in any
a. symbol. c. element.
b. isotope. d. compound.
3. A covalent bond is formed by the
a. transfer of electrons. c. gaining of electrons.
b. sharing of electrons. d. losing of electrons.
4. When you shake sugar and sand together in a test
tube, you cause them to form a
a. compound. c. solution.
b. mixture. d. suspension.
5. A compound that produces hydrogen ions in
solution is a(an)
a. salt. c. base.
b. acid. d. polymer.
6. In polymerization, complex molecules are formed
by the joining together of
a. macromolecules. c. polymers.
b. carbohydrates. d. monomers.
8. Proteins are polymers formed from
a. lipids.
b. carbohydrates.
c. amino acids.
d. nucleic acids.
9. An enzyme speeds up a reaction by
a. lowering the activation energy.
b. raising the activation energy.
c. releasing energy.
d. absorbing energy.
10. In a chemical reaction, a reactant binds to an
enzyme at a region known as the
a. catalyst.
b. product.
c. substrate.
d. active site.
Answer:
I wont be able to answer all of them but: 1. C
2. Compound
Explanation:
A positive charge is called a proton, no charge is a neutron and a negative charge is a electron
When atoms are combined they are called a compound.
Hopes this helps you a bit.
The mutated DNA is TAC CTC ACT GAG CGT.
What is the impact of this particular mutation on the organism? In order to find out, you need to transcribe and translate the codons.
Answer:
The mutation that involves the change in the sequence of DNA bases is reflected both in the transcription of mRNA and in translation, giving rise to an alteration in the protein, which may not function and whose impact on the organism is a morphological or functional alteration.
Explanation:
According to this scenario, the DNA has experienced a mutation by changing the sequence by one of its bases, Cytosine by Thymine, producing in the mRNA a termination codon that interrupts the normal synthesis of the protein, preventing that protein from fulfilling its function. This particular mutation is called Nonsense mutation.
For normal DNA
DNA TAC CTC ACC GAG CGT
mRNA AUG GAG UGG CUC GCA
Protein Met - Glu - Trp - Leu - Ala
For the mutated DNA
DNA TAC CTC ACT GAG CGT
mRNA AUG GAG UGA CUC GCA
Protein Met - Glu - STOP - Leu - Ala
The change of a cytosine by Thymine in the mutated DNA produces that the third codon of the mRNA is altered, encoding a UGA termination codon, which prematurely stops the protein synthesis and originates an incomplete protein, probably not functional, whose impact in the organism is a morphological or functional alteration.
Answer:
C- active B- diffusion A- facilitated
Explanation:
Answer:
Povidone: its action is produced by oxidation and inactivation of cellular components.
Triclosan: is absorbed by intact skin which determines its persistence and its speed of action is intermediate.
Explanation:
Povidona:
- It presents the same mechanism of action and spectrum of iodine.
- It is a water-soluble compound that results from the combination of iodine and polyvinylpyrrolidone, which improves the solubility of iodine and allows its gradual release into tissues. This effect determines less skin irritation and greater product availability over time.
- The term "available iodine" refers to the amount of iodine available as a reservoir and that of free iodine to the percentage in solution in working condition, that is, a 10% povidone iodine solution, contains 1% of available iodine and the iodine concentration Free is 1 to 2 parts of a million that remains until the available iodine is depleted. This product advantage is lost when diluted in water, since in these circumstances it behaves as an aqueous solution of iodine.
- Its activity can be diminished by the presence of blood or other organic matter.
- The concentrations commonly used as a surgical scrubber are 7.5% and 8% and in the one used for cures it is 10%.
- In relation to tincture of iodine or lugol, it presents less dermal irritation. They should be used with caution in newborns and burned
- Its antiseptic action is classified between high level and intermediate level. They are lethal in minutes for bacteria, fungi, viruses, protozoa, amoeba cysts and spores. However, in front of dry spores it requires a longer exposure time (hours).
- Iodized antiseptics have the advantage of being cheap.
Triclosan:
- It is a relatively new phenolic derivative that acts causing damage to the cell wall of microorganisms. It is broad-spectrum bacterial, better for Gram + and there is little information about its activity in viruses.
- It is absorbed by intact skin which determines its persistence and its speed of action is intermediate.
- No allergenic or mutagenic effect has been demonstrated in short periods of use.
- Its activity is minimally affected by organic matter.
- The concentrations of usual use are between 0.3% and 2%.
- It is mainly indicated for clinical handwashing where it is used in 1% breads and in 0.5% liquid preparations.