describe the structure and functions of various organelles in a mature animal cell
Answer:
Explanation:
Cell Membrane
A thin semipermeable membrane layer of protein and fats surrounding the cell. Its primary role is to protect the cell from its surrounding. Also, it controls the entry and exit of nutrients and other microscopic entities into the cell.
Nuclear Membrane
It is a double-membrane structure that surrounds the nucleus. It is also referred to as the nuclear envelope.
Nucleus
It is an organelle that contains several other sub-organelles such as nucleolus, nucleosomes and chromatins. It also contains DNA and other genetic materials.
Centrosome
It is a small organelle found near to the nucleus which has a thick centre with radiating tubules. The centrosomes are where microtubules are produced.
Lysosome (Cell Vesicles)
They are round organelles surrounded by a membrane and comprising digestive enzymes which help in digestion, excretion and in the cell renewal process.
Cytoplasm
A jelly-like material which contains all the cell organelles, enclosed within the cell membrane. The substance found within the cell nucleus, contained by the nuclear membrane is called the nucleoplasm.
Golgi Apparatus
A flat, smooth layered, sac-like organelle which is located near the nucleus and involved in manufacturing, storing, packing and transporting the particles throughout the cell.
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The table above lists the types of white blood cells found in humans, indicates how abundant they
are, and describes their functions.
The two most abundant types of white blood cells may both be involved in a response to which of
these?
A. allergens
B. heat
C. bacterial infection
D. injury
Can a male be a carrier for colorblindness?
Explanation:
yes
X chromosome from his mother
PLZ HELP ITS EASY ITS DUE IN 5 MINUTES
1. Which statement is true about DNA?
a. DNA is an exact copy from parent to offspring.
b. DNA is not necessary for an organism to reproduce.
c. DNA contains genes that hold specific traits for an organism.
d. Organisms create their own DNA sequence that is not like their parents.
Answer: C
Explanation:
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Put the following processes of protein synthesis in the correct order.
1.DNA strands unwind and separate
2.mRNA copies DNA according to complimentary base pairing.
3.mRNA leaves the nucleus
4.tRNA's anticodons bring amino acids to the corresponding mRNA codons
5.amino acids bind to each other making a protein
6.a stop codon is reached, the newly formed protein is released to go do its job for the cell
Answer:
1. DNA strands unwind and separate 2.mRNA leaves the nucleus 3.mRNA copies DNA according to complimentary base paring .4 tRNA anticodons bring amino acids to the corresponding mRNA codons. 5 amino acids bind to each other making a protein 6. a stop codon is reached, the newly formed protein is released to go do its job for the cell
what caused a decrease of carbon dioxide in the biodomes air
Answer:
As organisms release energy during cellular respiration, carbon dioxide is produced from the carbon in energy storage molecules. ... Carbon dioxide in the biodome decreased because decomposers decreased which means there was a decrease in cellular respiration overall.
There are several possible reasons why the carbon dioxide levels in the air of a biodome might decrease like photosynthesis, respiration, ventilation and carbon sequestration.
What are the factors responsible for decrease of carbon dioxide in the biodomes air?There are several possible reasons why the carbon dioxide levels in the air of a biodome might decrease. Some possible causes include:
Photosynthesis: If the biodome contains plants, they may be using carbon dioxide during photosynthesis to produce oxygen and glucose. This process would remove carbon dioxide from the air.
Respiration: If the biodome contains animals or microorganisms that respire, they may be consuming oxygen and producing carbon dioxide. This would result in a decrease in carbon dioxide levels in the air.
Ventilation: If the biodome has a ventilation system, it may be designed to remove excess carbon dioxide from the air. This could result in a decrease in carbon dioxide levels.
Carbon sequestration: If the biodome has systems in place to capture and store carbon dioxide, such as through the use of plants or other methods, this could result in a decrease in carbon dioxide levels in the air.
It's important to note that the specific cause of a decrease in carbon dioxide levels in the biodome's air will depend on the specific conditions and systems in place within the biodome.
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Using the image below, determine what type of solution the LYSED cell is in.
Captionless Image
a.
Not enough information is provided
b.
Hypotonic
c.
Isotonic
d.
Hypertonic
Answer: B: Hypotonic
Explanation:
Just took the test.
Just a quick summary will do!:
A. Sickle Cell Anemia is caused by a base change in DNA. Describe how the base change results in a faulty protein being made.
B. Briefly explain the inheritance pattern of the condition.
Answer: a) The single base change mutation occurs at the beta chain of haemoglobin when glutamic acid is replaced with valine.
b) Sickle Cell Anemia is inherited in an autosomal recessive pattern.
Explanation:
Haemoglobin is a protein found in the red blood cells whose main function is to transport oxygen. Sickle Cell Anemia is a disorder caused by a base change in DNA beta chain of haemoglobin. The amino acid valine is substituted for glutamic acid at one point in each of the two beta chains. When this type of hemoglobin is exposed to low oxygen, it forms elongated crystals inside the red blood cells that are sometimes 15 micrometers in length. These make it almost impossible for the cell to pass through many small capillaries, and the spiked ends of the crystals are likely to rupture the cell membrane, leading to sickle cell anemia.
In describing the inheritance patterns of sickle cell anaemia, it is of autosomal recessive pattern. This means that the parent of the affected individual both carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition. The gene for normal red blood cell is dominant over the gene for abnormal red blood cell which is said to be recessive. A person who is a stickler should have the genotype SS.
Brown rabbits have the genotypes BB or Bb. White rabbits have the gene type bb. If two brown rabbits, with the genotypes seen in the punnet square above, have baby rabbits, what is probability that the baby rabbits will also be brown
Answer:
the answer would probably be 75%
Explanation:
If you do a punnet square it will show the results.
what is the genotype of blood group B
Answer:
genotype of bg B can be two
1st is Ibi
2nd is IbIb
In the picture of the ocean floor, letter D marks what feature?
A Cavern
B. Rift zone
C. Deep ocean basin
D. Continental slope
Answer:
C i hope it helped!!!!
Explanation:
Which cell is represented by the avocado's skin
Answer:
Cell membrane
Explanation:
Which scientist made x-ray diffraction photos of DNA?
O Franklin
O Chargaff
O Watson & Crick
Answer:
Rosalind Franklin
Explanation:
Created by Rosalind Franklin using a technique called X-ray crystallography, it revealed the helical shape of the DNA molecule.
Why might DNA mutation occur?
if the same amount of DNA remains
unchanged for too long
if there is a genetic code that tells the DNA to
mutate
o if DNA only receives information from one
gamete
O if there is a change in DNA that alters or
affects the genetic code
DONE
Explanation:
it can result from DNA copying mistakes made during cell division,exposure to chemicals called mutagens or infection by viruses
What is the main reason we need protein in our diets
Answer:
Every cell in the human body contains protein. The basic structure of protein is a chain of amino acids. You need protein in your diet to help your body repair cells and make new ones. Protein is also important for growth and development in children, teens, and pregnant women
Explanation:
23) Tiny animals, called coral polyps, that secrete limestone create a.Barrier islands b.Coral reefs c.Swamps d. Salt marshes
Answer:b)coral reefs
Explanation: Coral reefs are made up of corals called polyps and algae.
Which is the smallest unit of life?
A. Atoms
B. Organelles
C. Organism
D. Cells
Answer:
D, cells.
Explanation:
D. Cells. Hoped this helped
What is an adaptation?
O A choice made by humans about what organisms breed for advantageous traits.
O A trait that increases the fitness of an organism.
O Atrait that an organism acquires without genetic influence.
Answer:
A trait that increases the fitness of an organism
Explanation:
An adaptation helps an organism survive
Please help I will mark brainlest
Answer:
Try B. C and D are helping stop global warming and A isn't as much of a factor
Answer:
B is the most logical one
Help help fast please
pls help
One cat carries long-haired traits (Hh), and it's mate carries short haired traits (hh)
Use the Punnett square (in the image) to determine the probability of one of their offspring having long hair.
What will be the mRNA sequence transcribed from a TTAAACGGCCTA template?
Answer:
AAU UUG CCG GAU
Explanation:
T--> A
A-->U
C-->G
G-->C
The mRNA sequence transcribed from a TTAAACGGCCTA template AAU UUG CCG GAU.
What is mRNA sequence?
The method of choice for evaluating the transcriptomes of disease states, biological processes, and across a wide range of study designs has quickly emerged as mRNA sequencing (mRNA-Seq).
mRNA-Seq can detect both known and novel transcript isoforms, gene fusions, and other properties in addition to being a very sensitive and accurate method of assessing gene expression.
A comprehensive view of the coding transcriptome that is unrestricted by the prior knowledge filter is provided by mRNA-Seq.
Therefore, The mRNA sequence transcribed from a TTAAACGGCCTA template AAU UUG CCG GAU.
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1. What is the natural movement of one type of rock to another type of rock
called?
Your answer
Answer:
Weathering or perhaps Erosion would be better.
Explanation:
I'm not 100% sure what this question is asking but I believe in you!
which type of mountain forms because of an oceanic plate and a continental plate colliding?
a. Aleutian
b. Continental-continental
c. Fault-block
d. Andean
Answer:
D.) Andean
Explanation:
Andean is the kind of mountain formed due to an oceanic plate and continental plate colliding.
Answer:
your answer to this question is Andean letter D
Explanation:
which of carbs, fats ,minerals, proteins, vitamins, water are organic and which are inorganic
what is the chemical equation of photosynthesis
Answer:
The balanced chemical equation for photosynthesis is as follows: 6 CO2 + 6 H2O → C6H12O6 + 6 O2
Explanation:
Achromoplast stores while a leucoplast stores A. starch; pigments B. chlorophyll; starch C. pigments; chlorophyll D. pigments; starch
Answer:
D. pigments; starch.
Explanation:
A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles.
A chromoplast can be defined as a heterogeneous organelle or plastids that is typically responsible for pigment synthesis and their storage in a plant. The pigments include red, orange, yellow or chlorophyll.
On the other hand, leucoplast is a colorless plastid i.e plastic lacking photosynthetic pigments that are typically found in storage organs, underground stems, cotelydons, roots, tubers, seeds, or endosperm etc., used for the storage of starch in the absence of sunlight.
Hence, a chromoplast stores pigments while a leucoplast stores starch.
Which parts of the body help to make up the first line of defense for your immune system ?
a. white and red blood cells
b. Skin,breathing passages, mouth and stomach
c.T & B cells
d. Memory cells and antibodies
Answer:
b
Explanation:
its the first thing that bacteria or any pathogens come into contact
About 96% of sea water is made of: A. Nitrogen/ B. Carbon dioxide/ C. Sodium and chloride/ D. Hydrogen and oxygen
Answer:
Hydrogen and oxygen
Answer:
D. Hydrogen and oxygen
Explanation:
It is obvious that this is the answer because the ocean is mostly water. H2O, or 2 hydrogen atoms and 1 oxygen atom, makes up water.
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1. The rate at which materials enter and leave the cell depends on the cell's