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Tay Sachs disease is an autosomal recessive disorder involving the hexoaminidase gene. What type of mutation occurs in this gene?
Tay-Sachs disease is caused by mutations in the HEXA gene and inheritance is autosomal recessive . The HEXA gene gives the body instructions to make part of the beta-hexosaminidase A enzyme, which is needed to break down a substance called GM2 ganglioside.
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Answer:
Frameshift mutation
Explanation:
A frameshift mutation is a genetic mutation caused by insertions or deletions that shift the whole sequence.
Name the enzyme that breaks the hydrogen bonds holding the
two DNA strands together during DNA replication?
DNA helicase is the enzyme that breaks the hydrogen bonds which holds the two DNA strands together during DNA replication.
What is DNA helicase?During replication of DNA , the enzyme DNA helicase separates the two strands of DNA and causes the breakdown of hydrogen bonds between the two DNA strands which leads to separating of the DNA double helix into two individual strands which make easier to copy it.
In conclusion, DNA helicase is the enzyme that breaks the hydrogen bonds.
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Which of the following statements describes a process that occurs during photosynthesis but not during cellular respiration?
ATP is produced that stores energy.
O
Chemical energy is converted to light energy.
Reactions occur in the mitochondria of the cell.
Light energy is converted to chemical energy.
Answer:
D (see below for explanation)
Explanation:
Using the process of elimination, we can go down the answer choices:
A) ATP is produced that stores energy.
In photosynthesis, light energy, water, and carbon dioxide is taken in and converted to oxygen and glucose. Cellular respiration, however, uses glucose and oxygen and converts it to water, carbon dioxide, and ATP.
As you can see, there is no mention of ATP in photosynthesis. ATP is not created in photosynthesis—photosynthesis' main purpose is to make food for the organism.
So A is not the answer.
B) Chemical energy is converted to light energy.
In photosynthesis, the light energy taken in is converted to chemical energy so it can be used. Cellular respiration requires only oxygen and glucose, so light energy doesn't relate to cellular respiration directly.
However, if you read the answer carefully, it says that chemical energy is converted to light energy. The main purpose is to use the light energy, which cannot be used in its light form, so it has be converted into chemical energy.
So B is not the answer.
C) Reactions occur in the mitochondria of the cell.
Photosynthesis occurs in the chloroplasts of an organisms. Heterotrophs do not have chloroplasts, so they cannot make their own food. However, mitochondria are in all eukaryotic cells, as cellular respiration occurs in all eukaryotic cells as well.
Cellular respiration happens in the mitochondria of a cell. Photosynthesis does not.
So C is not the answer.
D) Light energy is converted to chemical energy.
If you go back to my explanation for B, you can see that photosynthesis uses light energy, but to do so, it has to convert it to light energy first. It cannot use light energy itself.
So D is the right answer.
Your skin cells have 46 chromosomes. After they complete the cell cycle, how many chromosomes will be in the daughter cells? Explain.
Answer:
46
Explanation:
The skin cells with 46 chromosomes will each produce daughter cells with 46 chromosomes after they complete the cell cycle.
The skin cell is a vegetative cell that can only divide through mitosis. Mitosis is also referred to as equational division during which a cell produces two daughter cells that are both genetically and phenotypically similar to the parent cell.
During the cell division, at the anaphase stage to be precise, the chromosomes are separated into sister chromatids and sister chromatids of the same chromosomes move in the opposite direction to the poles of the cell before the cytoplasm of the mother cell divides to produce two independent daughter cells. Each chromatid in the new daughter cells then goes ahead to become a complete chromosome with two sister chromatids.
Hence, at the end of the cycle, each daughter cell ends up having the same 46 chromosomes as the parent cells.
What would happen to a cell if there was no proteins that went through the membrane?
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describe the different processes involved in the movement of these substances into and out of the cell; oxygen, carbon dioxide, glucose, potassium, water, and enzymes.
Answer:
Dissolved or gaseous substances have to pass through the cell membrane to get into or out of a cell. Diffusion is one of the processes that allows this to happen. Diffusion occurs when particles spread.
Explanation:
To enter or exit a cell, dissolved or gaseous substances must pass through the cell membrane. One of the mechanisms that makes this possible is diffusion. Particles diffuse when they spread.
What is cell?Cell is defined as the fundamental membrane-bound entity that houses the essential molecules of life and is the building block of all living things.
It can also be defined as a semipermeable cell membrane encloses one or more nuclei, cytoplasm, and different organelles, which are the smallest structural component of an organism capable of autonomous functioning.
There are basically two types of cell.
Prokaryotic cellEukaryotic cellCell membrane is defined as a biological membrane that keeps all cells' interiors isolated from the outer world and provides protection for it.\
Barriers and gatekeepers are cell membranes. Because of their semi-permeability, some molecules can diffuse across the lipid bilayer but not others.
Thus, to enter or exit a cell, dissolved or gaseous substances must pass through the cell membrane. One of the mechanisms that makes this possible is diffusion. Particles diffuse when they spread.
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Two black guinea pigs were crossed and they produced a litter of 4 black and 3 white guinea pigs. Which best explains this occurrence?
White fur is dominant to black fur.
White fur was the result of a mutation.
Both parents were heterozygous for black fur.
Answer:
Both parents were heterozygous for black fur.
Whale
Horse
Bird
Cat
Bat
Human
These limbs provide evidence of common ancestry because they -
Answer
A have the same basic structure
B pedom the same function
С
are the same size
Dare parts of mammals
Answer:
The answer is A
Explanation:
All the the different limbs all have an upper arm bone which is the humerus and two forearm bones which are the ulna and the radius.
The limbs of Whales, horses, birds, cats, and humans provide evidence of common ancestry because they have the same basic structure. Thus, the correct option for this question is A.
What is a common ancestor?A common ancestor may be defined as an ancestral organism that is significantly shared by two or more descendent lineages. In a more simple term, an ancestor that they have in common. These ancestors follow each taxon's lineage back in time until all the lineages meet up.
A Common Ancestor is a lineage that undergoes cladogenesis, that is, branching evolution, such that more than one species can trace its ancestry back to the common ancestor or, more accurately, to multiple common ancestors.
Therefore, the limbs of Whales, horses, birds, cats, and humans provide evidence of common ancestry because they have the same basic structure. Thus, the correct option for this question is A.
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PLS HELP!!!!
Can you describe a frogs metamorphosis, including whether it is complete or incomplete
Explanation:
Frog undergoes a complete metamorphosis. It includes the egg, tadpole, froglet and then adult frog stages. In complete metamorphosis the hatchling does not resemble the parent and changes as it grows to be an adult.
During metamorphosis the tadpole will develop back legs first, then front legs. Around 6 weeks of life the mouth starts to widen. Sometime around 10 weeks the froglet’s, as it is now called, eyes start to bulge out and the tail begins to shrink and eventually disappear. When the lungs finish developing the froglet makes it’s way onto the land and, Ta-da! It’s a frog!
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The students meet with a team of geologists that is studying the rock layers at the first roadcut. The geologists find fossils of the same kind of organisms in layers P and Q. Which of the following conclusions about the layers at the second roadcut is most likely true
A) The fossil found at the first roadcut should only be found in layers P and Q at the second roadcut
B)The fossil found at the first roadcut should be found in layers P, N, and Q at the second roadcut
c) The fossil found at the first roadcut should only be found in layer N at the second roadcut
D) The fossil found at the first roadcut should not be found in any layers at the second roadcut.
22. Why do you think the sea urchin was chosen to test the effect of changes in pH?
Answer:
as it settles deeper underwater ph tends to be higher and a sea urchin tends to be more resilient to change
Acidic seawater, at current pH levels found in the world's oceans, can have a negative impact on sea urchin larval development so it is taken to test the effect of changes in pH.
What is sea urchin?Sea urchins are spiny, globular echinoderms of the Echinoidea class. The urchins were able to compensate for internal pH in modest acidification (pH 7.8) and not in higher acidification (pH 7.6).
The pH of coelomic fluid was lower at higher temperatures.
Thus, due to this, the sea urchin was chosen to test the effect of changes in pH.
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What is the difference between environmental science and environmentalism?
Answer:
Environmental science is the pursuit of knowledge about the workings of the environment and our interactions with it. Environmentalism is a social movement dedicated to protecting the natural world.
Explanation:
The first living organisms were very complex and multicellular.
true or false?
Answer:
False.
Explanation:
The first living organisms were very simple and unicellular.
Which of the below is NOT a cephalopod?
A. squid
B. snail
C. octopus
D. nautilus
What helps allows plants to bring water up from the roots to the top of the plant?
a. polarity.
b. capillary action.
c. absorption.
d. low specific heat.
What word describes the majority of permanent genetic mutations?
-beneficial
-helpful
-minor
-harmful
_____ cannot be grown in a lab culture unless living cells are present.
A. Fungi
B. Plants
C. Viruses
D. Bacteria
Answer:
B. Viruses
Explanation:
Viruses are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.
When your cells use fat for energy, the fatty acids are broken up into molecules of acetyl CoA. Predict how many ATP can be made from one molecule of acetyl CoA if oxygen is present. Show your work.
Answer: Suppose that each fatty acid in a certain fat can make 9 molecules of acetyl CoA. Predict how many ATP can be made from the fatty acids in this fat. This would make 27 acetyl CoA, and therefore would make 27 ATP
Explanation:
Which of the following is not directly involved in protein synthesis?
tRNA
mRNA
Ribosomes
Mitochondria
Why are reproductive technologies important to some infertile couples?
Based on these drawings, which element is the least reactive?
Answer:
ne
Explanation:
Fill in the missing bases in the following picture:
Answer:
1: G to C
2: C to G
3: T to A
4: G to C
5: T to A
Explanation:
look at number 1 and number 4, they have the same box. Along with 3 and 4 they have the same arrow.
I need an answer quickly please
Answer:
b
Explanation:
What are the 5 main functions of soil? List and describe each
Soil covers the surface of the Earth and is a valuable ecosystem. Soil is made up of minerals, nutrients, water, air, organic matter and microorganisms. Because of its makeup, soil has a variety of uses in a variety of industries.
Agriculture
Soil has vital nutrients for plants. As a result, it is used in agriculture to nourish plants. The roots of a plant receive nutrients from the soil to help it grow. The North Carolina Department of Agriculture and Consumer Services notes that 13 essential plant nutrients come from the soil.
Building
Soil is an important part of the building process. Soil compaction, which increases the density of the soil, is done as part of the building process. The purpose of the compaction is to improve the load support. If not done, structural failure can result. Soil can also be used as building materials such as adobe and red bricks.
Pottery
Clay soil is used in making ceramics, or pottery. When water is added to clay soil, it can be used to create the ceramics. Once formed, you can leave it to dry and it will retain its shape. Any type of ceramic can be created with the clay soil, such as a vase, bowl, cup or sculpture.
Medicine
Soil is commonly used in antibiotics. Microbes created in the soil are harmful to bacteria, which is why soil is used in medicine. Medicines created by soil include skin ointments, tuberculosis drugs and anti-tumor drugs.
Beauty Products
Some beauty products are made with soil. Commonly used beauty products where used soil is used in the production include blush and foundation. Soil rich in clay can also be used in facial masks and toothpastes.
The main function of the soil is to serve as a seat, facilitate the permeability and circulation of water and air, being important for plant life.
What is soil?It is the layer that covers the most superficial part of the planet and it is where plants grow and animals live.
Functions of soilBiomass production.It supplies water, air, and nutrients to plants, provides food, energy, raw materials, and natural traits.
Hydrological function.It intervenes in the regulation of infiltration, storage and flow of surface and subsurface water and its quality.
Environmental function of filtering, storage and transformation.Filtering, pH buffering, retention of hazardous waste compounds and polluting discharges, etc.
Biological habitat and gene pool.Reserve of genes of animals and plants essential for the maintenance of biodiversity.
Wheater regulating function.Sink of greenhouse gases and effects on the global energy balance and the global hydrological cycle.
Therefore, we can conclude that soils acts as a filter, buffer medium and storage of water, air, nutrients and chemical products or discharges.
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Why is it necessary to conserve nonrenewable energy sources?
A. They can be exhausted.
B. They can be easily extracted.
C. They are the only resources of energy on Earth.
D. They are energy sources with the least amount of emissions.
Answer:
A
Explanation:
they are nonrenewable meaning they aren't renewable
Why does evolution matter
Answer:
thank me later
Explanation:
How do animals living in social groups affect the animals nutritional needs?
Answer:
they can have a happy life and rely on others for a social interaction... even if they are animals they need this
Why does DNA have to relocate
Answer:
chromosomes are made up of a DNA protein complex called chromatin that is organized into subunits called nuclesomes...
What does it mean for a trait to be dominant?
A.That it will be hidden by the recessive trait and not show up in the offspring.
B.That it will be the allele that will be shown in the offspring.
Answer:
B
Explanation:
Answer:
B. That it will be the allele that will be shown in the offspring
Explanation:
If something is dominant, that means it's stronger or more assertive. Think of an alpha wolf. It is dominant and is more assertive over its pack. The same is true for alleles (in most cases)
