OF CHAPTER REVIEW QUESTIONS
iple Choice Questions
. The principal site of protein synthesis in a cell is
a. Endoplasmic reticulum
C.
Ribosomes
b. Nucleus
d. Golgi - Apparatus
a.
Answer:
b. Nucleus
Explanation:
A cell can be defined as the structural, fundamental, biological and functional unit of life. Cells are found in all living organisms because they are the basic unit of life. A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells. Generally, cells have the ability to independently replicate themselves. In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles with their respective functions in all living organisms such as trees, birds, and bacteria include;
1. Cell membrane : is the wall of the cell and typically controls what leaves and enters the cell.
2. Mitochondria : it provides all the energy required in the cell by transforming energy forms.
3. Lysosomes : they are responsible for absorbing materials and breaking the materials taken in by the cells.
4. Chromosomes : they give sets of instructions for the synthesis of products.
5. Ribosomes : they are involved in the build up of proteins.
6. Endoplasmic Reticulum : this is where the ribosomes perform their tasks.
7. Cytoskeleton : they help to maintain and support the shape of the cells.
8. Vesicles : they ensure proteins are properly transported to the right and exact location.
9. Golgi apparatus : it prepares the protein for export by chemically tagging them.
10. Nucleus : it controls all the activities taking place in the cell and the synthesis of proteins.
Hence, the principal site of protein synthesis in a cell is nucleus.
I NEED HELP ASAP PLS If the Gulf Stream cooled, what would happen to the climate?
If AMOC and the Gulf Stream do become weaker, the probability is that Northwest Europe is going to get cooler, or not warm as much as it otherwise would under global anthropogenic climate change. And if sea level is a little bit higher, maybe because of the Gulf Stream weakening, it only makes matters worse.
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ok so, The question is:
how does building a road, affect Logging companies? please make a SHORT answer not a LONG one
Answer:
Explanation:
building a road, affect Logging companies because the consequences of building the road are that it will provide loggers access to highly-valued trees, provide a more accessible trade route for merchants and farmers, affect the wildlife and water quality in the area, and possibly cause indigenous populations to relocate.
Answer:
Building a road effect logging companies by cutting down other trees in order to make a clear spot for the road
Explanation:
compared to gases liquids are not easily compressed because particles of liquids do what?
Answer:
LiquidsEdit
Because the particles can move, liquids don't have a definite shape, and they can flow. Because the particles are still packed close together, liquids can't easily be compressed and keep the same volume.
Explanation:
Answer:
particle of liquid exert pressure because they have low intermolecular space than compared to gas
Explain why global efforts are being made to mass vaccinate populations and the importance of herd immunity in wiping out disease nationally and globally?
Historically many ideas concerning cells have been examined leaving three to be incorporated into the cell theory which of the following is not part of the cell theory
Answer:all life form contains more than one cell
Explanation: thats the only question that's not true
Historically, many ideas concerning cells have been examined, leaving three to be incorporated into the cell theory except that all life forms are made up of more than one cell as the life forms can either be single or multicellular.
What is the significance of the theory behind the cell?Cell theory, a foundational concept in biology, states that all living organisms are made of cells, and these cells come from pre-existing cells and not from anywhere else. All these postulates support the idea that cells are the basic building blocks of life and that life can only be generated through the replication process.
Hence, historically, many ideas concerning cells have been examined, leaving three to be incorporated into the cell theory except that all life forms are made up of more than one cell as the life forms can either be single or multicellular.
Learn more about the cell and its theory here.
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Humans are creating antibiotic resistant bacteria through a process of.....?
Breeding
Natural selection
Recombinant DNA
Humans are creating antibiotic resistant bacteria through a process if Recombinant DNA
What are some examples of lab saftey rules. Explain why these rules are put in place for the learning environment and what would a lab class look like without any lab safety rules.
Answer:
How was the government able to make children go to residential school?
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17
Genetic diversity is an advantage to all living species. Why is this usually necessary to the success of a species?
A It keeps them from evolving at a rapid pace
B It decreases the gene pool of a species, allowing them to withstand major changes or challenges as a species
It increases the gene pool of a species, allowing them to withstand major changes or challenges as a species
It allows the to evolve more rapidly into different species
Answer:
Anwer is it increase the gene pool of species allowing them withstand major changes or challenges as a species
Pls help I’ve been looking for hours
Answer:
Explanation:
The shape of the protein is really important for the function. Disulfide bonds also called disulfide bridges are important for stabilizing the protein. If the structure of the protein is damaged (by heat or other factors), then the protein will not be able to perform its function.
Besides plants, list 2 other organisms that carry out photosynthesis.
HELP PLEASE!!!!
Answer:
Photosynthesis is carried out by algae, cyanobacteria, and even some animals.
Question 21
4
Which nucleotide is only present in RNA?
Cytosine
Thymine
Uracil
Adenine
Answer:
The answer is Uracil
Explanation:
Uracil is the only nucleotide present in RNA. remember this RNA is ACGU and DNA is ACGT. See the difference?
Q. In which form
(i) oxygen is carried to the tissues ?
(ii) CO2 moves out of the blood ?
It is short answer question..I'll appreciate!
➜ Oxyhaemoglobin.
➜ Carboxyhaemoglobin and as carbonic acid (CO2 dissolved in blood plasma).
Answer:
homogolobin
bicarbonate ions
Reason why a pest species is introduced sexually
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Answer:
Based on knowledge of enzymes and the given data, it can be concluded that Tcn-protease is most likely active in the alligator's stomach and Wx-protease is most likely active in the alligator's intestines. As clear from the graph, the enzymic activity for Tcn-protease is highest at an acidic pH, which means it works best in an acidic environment, such as the very acidic stomach of an alligator. It is additionally clear from the graph that the enzymic activity for Wx-protease is highest at a neutral pH; therfore, it is most likely to be found in a neutral environment, such as the alligator's intestines.
Explanation:
A pH less than seven is acidicA pH of at or around seven is neutralA pH of more than seven is alkaline (basic)Name one sign a plant is deficient in nitrate
Answer:
the leaves will turn a pale green or yellow color
Which two of the following form the base pairs in DNA?
Answer: These 2 are called the double helix made up of sugar and phosphate groups. Attached to each sugar is one of four bases--adenine, cytosine, guanine, and thymine.
Which of the following best illustrates evidence from comparative anatomy that
supports biological evolution?
Explanation:
our ancestors turning into humans that have evolved today
2. In the diagram below, west is to the left, east is to the right, and the observer is looking toward the north. What is the direction of the wind?
A. NE
B. NW
C. SE
D. SW
Answer: SW
Explanation:I got it wrong and it gives you the right answer so thats that
The direction of wind is SW direction. Hence option D is correct.
What is wind?Wind is defined as the air movement brought on by the Earth's rotation and the sun's uneven heating of the surface. The uneven heating of the Earth by the sun and the rotation of the Earth result in wind, which is the movement of air. Light breezes to natural disasters like hurricanes and tornadoes are all types of winds. In addition to being a plentiful and limitless resource, wind also generates power without consuming any fuel or polluting the environment.
An anemometer can measure wind speed, and a weather vane or wind vane can detect wind direction. When put with anemometers, many wind vanes can be installed in numerous locations to calculate the overall wind profile of a specific area.
Thus, the direction of wind is SW direction. Hence option D is correct.
To learn more about wind, refer to the link below:
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Two receptors bind to a same chemical messenger, but the concentration of this chemical messenger required to reach a certain number of bound messengers for one receptor is twice as great as the concentration for the other receptor. Thus, these two receptors have same ________, but different ________, to this chemical messenger
Answer:
binding specificity; affinity
Explanation:
Receptor binding specificity can be defined as the selectivity of a receptor to bind with a particular chemical messenger. Binding specificity is determined by the interaction between the chemical messenger and its specific receptor, as well as the binding site three-dimensional (3D) structure of both. This concept is contrary to receptor promiscuity, where a receptor can bind to many different chemical messengers. On the other hand, binding affinity can be defined as the overall affinity or avidity of binding. The binding affinity is determined by the accumulated strength of individual attractive forces between a chemical messenger (ligand) and its receptor.
Using the diagram as a guide, create a Punnett square to show a cross between Jason's father, who has brown hair, and Jason's mother, who has blonde hair (Hint! Jason's father's mother has blonde hair).
Explain the process of completing the Punnett square for Jason's parents. Be sure to correctly use the vocabulary terms Punnett square, genotype, phenotype, dominant, recessive, and alleles.
Based on the Punnett square, what is the probability that Jason would have brown hair?
Answer:
50% probability of brown hair.
Explanation:
Jason will have an 50% probability of having brown hair, brown hair is a dominant trait meaning Jason's fathers father had a brown phenotype as well since his mother had blonde phenotype. Causing Jason's father to have a genotype of of Bb, B is dominant brown phenotype and b is recessive blonde phenotype, and since Jason's mothers genotype is recessive b the possible genotypes are Bb, Bb, bb, bb so Jason has a probability of 50%.
Question 1 Which statement is true about fossils? O A fossil is any trace of prehistoric life. 0 To officially be a fossil, the remains of an entire organism must be found. O The remains of an organism that lived 500 years ago is called a fossil. Only the remains of animals. and not plant, can be made into a fossil. Question 2
Answer: The remains of an organism that lived 500 years ago is called a fossil.
Explanation:
A fossil can be defined as dead remains of plants and animals that existed past geological era. The traces of bones, and other skeletal remains, pollen, hard wooden materials can be found in the compact rock as the soft parts of the organisms are decomposed and decayed. The remains like shells, exoskeleton, amber, hair, and other can also be found. It takes many years for the development of fossil beneath the earth crust. The morphological, anatomical, physiological and molecular features can be assessed to know the age of the fossil.
Answer:
fossil is any trace of prehistoric life
What happens to a species when it becomes extinct? A. A few members adapt to a new environment. B. Most members move to a new environment. C. All members evolve into a new species. D. No members live to reproduce.
Answer:
D. is your answer
Answer:
no members live to reproduce
Explanation:
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Answer:
C.
Explanation:
A is mental well-being.
B is social well-being.
C is physical well-being.
D is medical well-being.
Answer:
C. getting regular exercise
Explanation:
Getting regular exercises is a part of physical well being as it makes us fit and healthy.
how does the enzyme impact activation energy
Answer:
Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.
Explanation:
Qué hace que los alimentos presenten zonas oscuras una vez que están cortados o pelados?
What is the genotype of Squidward's son?
This is the anwser to your question have a nice day!
how might changes in abiotic factors in an area lead to speciation
Answer:
they can involve biotic interactions like competition, predation, and disease, or abiotic factors like severe weather, flooding, drought, and fire. Most species appear to be limited in at least part of their geographic range by abiotic factors, such as temperature, moisture availability, and soil nutrients.
Explanation:
Which outcome is a consequence of nutrient pollution? A. Temperature change in the water B. Excessive growth of algae C. Migration changes in animals D. Reduced biodiversity of soil
Answer:
b
Explanation:
Nutrient pollution can create dead zones areas in water with little or no oxygen where aquatic life cannot survive. Also known as hypoxia, these areas are caused by algal blooms consuming oxygen as they die and decompose.
Answer:
B.
Explanation:
Excessive growth of algae
answer for plato
How would the introduction of a predator species affect the stability of an
ecosystem?
A. The native prey might not be able to protect itself against the new
predator, so the prey population would probably decline rapidly.
B. The stability would not change because the new predator would
simply replace the native predator.
C. The new predator would be unable to hunt effectively for native
prey, so the stability would not change.
D. The stability of the ecosystem would increase as a result of the
introduction of a new predator species.