Why does the Equator and the South Pole have different air temperature?
A difference between a Class I and a Class II tRNA synthetase is (select all that apply):
a. the Class I synthetase reaction requires a transesterification reaction not necessary in the Class II reaction.
b. the Class I synthetase uses the 2' OH of the 3' end of the tRNA as a nucleophile and the Class II uses the 3' OH.
c. the Class I synthetase requires ATP as a cofactor and the Class II does not.
d. the Class II synthetases are typically monomeric, whereas the Class I enzymes frequently function as multimeric protein complexes.
Answer:
Option b is the correct answer.
Explanation:
The 2' OH of each 3' end of the tRNA is used as a nucleophile by Class I synthetase, whereas the 3' OH is used by Class II.
The Class I aminoacyl-tRNA synthetase attaches amino acids to the 2'-OH group of the tRNA's 3'-end ribose residue, whilst the Class II synthetase attaches amino acids only to the 3'-OH group of the tRNA's 3'-end ribose residue. Both Class I and Class II enzymes conduct the transesterification process and the need of ATP.
What we have is option d is incorrect because, Class I enzyme is typically monomeric, while the Class II enzyme is dimeric or multimeric in nature.
ATP is produced during the light reactions of photosynthesis. This ATP is used to_____________in the Calvin Cycle.
A. split water into oxygen has and hydrogen
B. produce NADPH
C. reduce carbon dioxide into glucose
D. None of these are correct
Answer:
C
Explanation:
The energy source is ATP, and the reducing agent is NADPH, which adds high-energy electrons to produce sugar.
Where do we find most of our usable freshwater, and what can we do to keep it clean.
Answer:
we find most of our cleanest water in freshwater rivers and lakes and we keep it clean by using processing plants
Among native Americans, two types of earwax (cerumen) are seen, dry and sticky. A geneticist studied the inheritance of this trait by observing the types of offspring produced by different kinds of matings. He observed the following numbers:
Parents Number of mating pairs Offspring
Sticky Dry
Sticky × sticky 10 32 6
Sticky × dry 8 21 9
Dry × dry 12 0 42
a. How is earwax type inherited?
b. Why are there no 3:1 or 1:1 ratios in the data shown in the chart?
Answer and Explanation:
Due to technical problems, you will find the complete answer and explanation in the attached files
Which of the following best describes the function of the human nervous
system?
A. The nervous system collects and responds to information about
the internal and external environment.
O B. The nervous system protects internal organs and assists with
movement.
C. The nervous system protects the body against infection and helps
regulate body temperature.
O D. The nervous system transports oxygen and nutrients to the body's
tissues.
Answer:
A. The nervous system collects and responds to information about
the internal and external environment.
Explanation:
11. A goat eats away all the leaves of a small plant
(balsam). However, in a few days, new leaves could be seen
sprouting in the plant again. How did the plant survive
without leaves?
Answer:
chromosome boost
Explanation:
Its been told that researchers say that it may grow even bigger even when its been eaten
Red hair, blue eyes, and height are all examples of...
Answer:
Examples of polygenic traits
. What is the source of most ocean pollution?
a. activities on land
b..climate changes
C. aquatic animals
d. none of the above
Answer:
a
Explanation:
because humans cause most pollution such as cars,littering ,and toxic gases
a) A plant with the genotype DR/dr (representing the allele combination on each chromosome) produces gametes. List the genotypes of the gametes that can be produced and label each gamete as parental or recombinant.
Answer:
Dd Rr Dr Rd
Explanation:
What country is most likely to be in stage 4of population growth with a low birth and death rate?
Explain why bacteria are most suitable for genetic engineering
Answer:
Bacteria were the first organisms to be genetically modified in the laboratory, due to the relative ease of modifying their chromosomes. This ease made them important tools for the creation of other GMOs.
vi. What is water pollution?
vii. State three causes of water pollution/sources of water
viii. Give the effect of water pollution.
vi. Water pollution occur when harmful substances like chemicals or microorganisms contaminate streams, revers, lakes and other water bodies.
vii. Causes of water pollution are: industrial wastes, oil pollution and acid rain.
viii. Contaminated water becomes unfit for consumption by humans and cattle. As the result, there is drastic reduction of the fish population. Water pollution results in increase case of water borne diseases like cholera, diarrhea, etc.
I hope this helps :)
Answer: Water pollution is the act of polluting water bodies with pollutants and waste products.
Causes of water pollution;
I. Sewage: City sewage system
ii. Chemical waste: Industries and ships at harbors.
iii. Excreta or farces: Human and Animal dung.
Effects of Water pollution;
I. It supports the use of pathogens that can cause diseases.
ii. It makes water unfit for human consumption.
iii. It can kill aquatic organisms.
Iv. It produces unpleasant odors.
v. It can accumulate in the human body and become toxic later.
vi. It serves as a medium for breeding pathogens
vii. Food chain is affected.
viii. It leads to migration of animals.
ix. It leads to rapid vegetative growth of water plants which makes fishing and movement impossible. eg. Algae bloom.
Really hope it helps you and others
:) :)
:
the letters A, T, C, and G get highlighted in the people’s names. DESCRIBE the significance of these letters.
Answer:
Explanation:
If you are talking abou the movie GATTACA, then the reason is that A, T, G, and C are DNA coding letters so it would sort of make sense to highlight those to complement or enhance the movie's meaning (its also part of the movie's name)
I need someone who studies biology and genetics.
Is a pig crossed with a chimp possible, I just read an article about this and the person who had the idea was someone with the last name MCkarther PH.D. it made the news.
Answer:
The cross between two different species is called hybridization. The truth is that, for hybridization to occur, the species in question must have a certain kinship with each other, that is, they must belong to the same family of animals. An example is the cross between tigers and lions, pigs and wild boars, donkeys and donkeys, etc. Now, if there is no such familiarity between species, the truth is that hybridization will not be possible, which is the case of pigs and chimpanzees with each other.
A fossil can form when
A. An organism leaves an imprint in sediment, which hardens into stone.
B. groundwater minerals seep into preserved bone and shell materials.
C.an organism is trapped in sticky plant resin that hardens into amber.
D. All of the above
Answer:
b
Explanation:
formation of corals which are fossils too
Answer:
D, or its just A
Explanation:
Termites are insects that live in colonies. In a colony, the king and a queen are responsible for reproduction. Workers spend most of their time caring for the other termites and building the nest. Soldiers protect the nest from attacks.
The organization of the termite colony is an example of which benefit of social behavior?
foraging
protection
reproduction
division of labor
Answer:
division of labor I think
Answer:
D
Explanation:
describe muscle metabolic rate of penguins
Please Brefly describe how vaccines work and they help our immune system?
Answer:
vaccines have the smallest amount off the grid they are for in them so that you body can attack and get used that virus so that when you get it you are as bad
Explanation:
I think
What processes occur during S phase? Choose all which apply.
Cells do their normal work
Cells assess DNA replication
Cells duplicate their DNA
Cells synthesize proteins necessary for division
Cells divide their DNA into two nuclei
Answer:
I think it's only Cells duplicate their DNA
Which of the following processes is not primarily caused by humans?
A. air pollution
B. the greenhouse effect
C. thinning of the ozone layer
D. increased carbon dioxide levels
.
Answer:
D
Explanation:
A,B,C all caused by human. But D is less
Answer:
D
Explanation:
from my own understanding,we are not the only ones on this planet there are other animals
5) The following picture is of a single organism that has been Gram stained and is viewed under oil immersion on the compound light microscope. What is the reason for a single organism appearing like this after being Gram stained
Hi. You have not submitted any images about the microorganism the question refers to. This makes it impossible for me to answer your question. However, I will try to help you as best I can.
Gram stain is a test done to find out whether the bacteria are gram negative or gram positive. In this test, the bacteria are submitted to a certain type of dye and then are observed under a microscope. If the bacteria is gram positive, it will be purple in color. If the bacteria is gram negative, it will be red in color.
This is because after they are subjected to the violet dye, both types of bacteria absorb the color of the dye. However, before being observed under the microscope, the bacteria are washed with alcohol. Alcohol removes the dye from the gram negative bacteria, leaving them reddish. On the other hand, in gram positive bacteria, alcohol dehydrates the cell wall, compressing the pores and making the cell wall impermeable, preventing the dye from being released and, therefore, leaving the bacteria with a purple color.
Which of the following is a density independent factor which can affect a population
A. Food
B.weather
C. Shelter
D. Water
Pls help
Answer:
D
Explanation:
I am not confident...... It might be D. Water
What process is used (Mitosis or Meiosis) in the development of a zygote to a multicellular
animal?
Answer:
Mitosis I think?
Explanation:
Which factor contributes to the lower variation in rainforest temperatures?
Answer:
humidity
Explanation:
If the number of photosynthetic organisms on Earth decreased drastically, which would happen as a result?
A. Less water would be available on Earth’s surface.
B. Less solar energy would reach Earth’s atmosphere.
C. More oxygen gas would be found in Earth’s atmosphere.
D. More carbon dioxide gas would be found in Earth’s atmosphere.
The movement of molecules across a cell membrane using a membrane transport protein and cellular ATP energy, generally moving the molecules from a region of low to high concentration, is called
The movement of molecules across a cell membrane using a membrane transport protein and cellular ATP energy, generally moving the molecules from a region of low to high concentration, is called facililated transport
Answer:
Active transport: moving against a gradient
To move substances against a concentration or electrochemical gradient, a cell must use energy. ... Primary active transport directly uses a source of chemical energy (e.g., ATP) to move molecules across a membrane against their gradient.
Explanation:
(meow) <3
What moves particles like oxygen into cells ?
how do organisms reproduce asexually
Answer:
my cloning all the type of cells the animal has
Explanation:
2. what are the differences between Mitosis and meiosis
Answer:
The differences between Mitosis and meiosis is Mitosis involves the division of body cells, while meiosis involves the division of sex cells. The division of a cell occurs once in mitosis but twice in meiosis. Two daughter cells are produced after mitosis and cytoplasmic division, while four daughter cells are produced after meiosis