Those factors that are kept the same in the experimental group and the control group are called: A. manipulated variables
B. experimental variables
C. observed variables
D. control variables
if a solution contains 0.5 grams of nacl and 100 grams of water, nacl is the solute and water is the solvent. true or false?
The right answer to this question is: True
Water is a substance known for the whole world as the universal solvent, and that can mean lots of different things, but the main one is that water, as a solvent, will dissolve most of the other substances when they're poured with it. Besides that, the solvent will almost always be in a higher quantity that the solute, in this case, there are only 0,5g of NaCl and 100g of H2O, so by that, we can be sure that the water is the solvent, and the NaCl is the solute.
Transcription and translation of a gene composed of 30 nucleotides would form a protein containing no more than ___ amino acids.
Assume that the heart is beating at 70 beats per minute. what is the approximate length of the cardiac cycle? assume that the heart is beating at 70 beats per minute. what is the approximate length of the cardiac cycle? 0.75 sec 0.86 sec 0.92 sec 0.80 sec
The diversity of organisms present on earth is the result of
The diversity of organisms present on earth is the result of natural selection. members of species differs from one another in their phenotype. this variation in phenotype allows the occurrence of natural selection . Thus, natural selection works on genetic variations within a population, selecting the traits which are most adapted to the habitat.
Could rna have been the original site of information storage in the primitive cell? a difficult problem with this possibility is that
Out of the following given choices;
a. RNA is not able to carry information.
b. RNA is more complex in structure than DNA.
c. RNA would get stuck on the inner surface of the nuclear membrane.
d. primitive cells would not let RNA molecules across their membranes.
e. no conditions exist that favor production of both the sugar and base parts of an RNA monomer
The answer is E. According to evolution, the best adaptable trait in an environment is highly preserved. The chemical properties of RNA make large RNA molecules inherently fragile, and they can easily be broken down into their constituent. Therefore it is unconvincing that was it was used to store critical genetic information.
Basic amino acids are ________ (positive, negative) at pH 7 and acidic R group amino acids are ________ (positive, negative) at pH 7. Basic amino acids are ________ (positive, negative) at pH 7 and acidic R group amino acids are ________ (positive, negative) at pH 7.
The correct answer will be-
Amino acids are the building blocks of the protein molecule which is formed by the binding the amino acids in the chain via a peptide bond.
The amino acid is attached to four different groups on its four sides which includes the amino group, R group, carboxyl group and Hydrogen.
These attached groups to the amino acids determine the nature of the amino acid that is whether it will behave as an acidic molecule or basic molecule at physiological pH.
At pH 7, the attached amino group gets protonated and bears a positive charge making it a basic amino acid while the attached carboxyl group gets deprotonated making it negatively charged and thus acidic.
Thus, Positive and Negative is the correct answer.
There are five elements of a universal systems model: goal, inputs, processes, outputs, and feedback. Which of the following describes the "processes" portion of this model? (A)what is done to the inputs, (B) the results of the system (C) the money, time, and resources used on the model (D) information collected from the outputs
Option A. What is done to the inputs.
Processes means " To treat something", or "To deal with information". so here we process the inputs to get a result.
Why is cell membrane differentially permeable?