Answer:
Ribosomes are small dense and granular ribonucleoprotein (i.e., RNA and protein) particles found attached on the outer surfaces of endoplasmic reticulum and nucleus as well as freely scattered in cytoplasm, mitochondrial matrix and chloroplast.
Explanation:
History of Ribosomes:
Ribosomes were first isolated from E. coli by Tissieres and J. D. Watson (1958), who found that ribosomal RNA alone accounts for 22% of the total weight in rapidly growing cells (90% of total RNA). Palade (1953) was the first to observe the ribosomes as dense particles or granules in electron microscope. Upon isolation they were shown to contain approximately equal amounts of RNA and protein.
Size of Ribosomes:
There are mainly two sizes of ribosomes — (i) One is smaller prokaryotic found in bacteria and blue—green algae, having a sedimentation coefficient 70S equivalent to a molecular weight of 2.7 × 106 daltons. (Dalton is the unit of molecular weight. One Dalton is equal to the weight of one hydrogen atom), (ii) Other is of eukaryotic cells of plants and animals of 80S coefficient with a molecular weight of about 4 × 106 daltons.
what is the main difference between a cell nucleus and a nucleoid
Which cell structures work together to form a pseudopod?
A. cell wall and nucleus
B. eyespot and chloroplast
C. cytoplasm and plasma membrane
D. contractile vacuole and mitochondria
cytoplasm and plasma membrane
Pseudopodia are formed by some cells of higher animals (e.g., white blood corpuscles) and by amoebas. During amoeboid feeding, pseudopodia either flow around and engulf prey or trap it in a fine, sticky mesh.
PLEASE HELP
which of the following should be a characteristic of a stable ecosystem
a. an increase in human interference
b. an obundance of biodiversity
c. a high number of predators and a lesser number if producers
d. a lack of interdependence of organisms
Answer:
b. an obundance of biodiversity
which two locations are most likely to have both earthquakes and volcanoes?
A. convergent plate boundaries
B. divergent plate boundaries
C. transform plate boundaries
D. central areas of plates
Answer:
it's both A and B
example the junction between the eurasian plate and indo-Australian plate (region near the Himalayas) that is prone to earthquakes
Explanation:
brainliest plz
Which biomolecule is structurally important to the cell membrane as it comprises the bilayer?
What type of organism is the tuberculosis bacterium, a multicellular or unicellular organism? Explain.
Answer:
Explanation:
Multicellular
You wake up in the morning and get out of bed. Does the floorfeel cold or warm on your bare feet? On the lines below, write asentence that compares how it feels to step on a bare floor and ona rug on a cold morning.
Một đoạn phân tử DNA có 2200 nucleotide. Hãy cho biết đoạn DNA này dài bao nhiêu Å ? Biết một chu kì xoắn có 10 cặp nucleotide (nu), dài 34 Å.
Answer:
10 cm Tôi hy vọng điều này có thể giúp bạn
The Taiga biome has more biodiversity than the tropical rain forest biome.
True
False
false
tropical rainforest is the most diverse biome
how fast does a body decompose to skeletal remains?
Answer:
Timeline. In a temperate climate, it usually requires three weeks to several years for a body to completely decompose into a skeleton, depending on factors such as temperature, humidity, presence of insects, and submergence in a substrate such as water.
Explanation:
after water, which are the next most abundant substances in the human body?
Answer:
Proteins
Explanation:
After water, Proteins are the next most abundant substances in the human body.
In adult men , 60% of body is comprised of water whereas in women , 55% of body is comprised of water.
Protein makes up around 20% in body and is present in every cell.
What are Proteins?Proteins are large complex molecules and play critical roles in the body. They do most of the work in their cells and required for structure functions and regulation of body tissues.
Proteins are made up of smaller units called amino acids, which are attached to one another in long chains.
There are 20 different types of amino acids that can be combined to make a protein.
The sequence of amino acids determines about each protein’s unique 3-dimensional structure and its specific function.
Amino acids are coded by combinations of three DNA building blocks (nucleotides), determined by the sequence of genes.
Functions of Proteins:
1. As an Antibody- Bind to specific foreign particles such as bacteria and virus to help protect the body.
2. As an Enzyme- Carry out thousands of chemical reactions taking place inside the cell
3. As a Messenger- Transmit signals to coordinate biological processes between different cells, tissues and organs.
4. As a Structural Component- Providing structure and support to cells.
5. Transport/Storage- Binding and carrying atoms and small molecules within cells and throughout the body.
To learn more about the Proteins here
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Which organelle provides the energy for the cell to carry out protein synthesis
Answer:
Mitochondria
Explanation:
Mitochondria produces energy rich ATP molecules.
Answer:
The Mitochondria.
Explanation:
The Mitochondria, also known as the powerhouse of the cell, produces most of the cell's energy.
(a) State three conditions, other than water and the concentration of mineral ions, that
would need to be kept the same for all the plants, in order to make the investigation a
fair test.
1.
2.
3
Answer:
1: Periods of Light
2:Temperature Substrate
3:Soil Type
Explanation:
Plants use magnesium ions to make chlorophyll in their leaves. Like in nitrate deficiency, the plant is limited in terms of its photosynthetic ability and the plant growth is compromised. Magnesium is a limiting factor in healthy plant growth.
What did Robert Hooke use to discover cells?
Answer:
A microscope
Explanation:
He observed through a microscope and discovered cells.
Answer:
i belive he used the first microscopes but im not positive that is what your asking
Explanation:
s
Label the cell membrane
Answer:
a and b
Explanation:
i don't know ok
but is true
summarize the effects of mutations on organisms?
Answer: Harmful mutations may cause genetic disorders or cancer. A genetic disorder is a disease caused by a mutation in one or a few genes. A human example is a cystic fibrosis. A mutation in a single gene causes the body to produce thick, sticky mucus that clogs the lungs and blocks ducts in digestive organs.
Explanation: Hope this helped!
PLEASE HELP!! 100 POINTS!
Which of the following is the best example of a way human lifestyles affect environmental systems?
Using radioactive materials causes ground pollution as it causes methane to seep into the ground.
Burning fossil fuels causes water pollution by increasing the amount of water vapor in the atmosphere.
Deforestation causes acid rain by decreasing carbon dioxide (CO2) in the atmosphere.
Using aerosols that contain chlorofluorocarbons (CFCs) decreases the amount of protective ozone (O3).
Answer:
Burning fossil fuels causes water pollution by increasing the amount of water vapor in the atmosphere.
Explanation:
This is the best example because when burning fossil fuels, greenhouse gases are released, which can cause global warming. This affects the environment.
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Which of the following is not a lipid?
Asteroid
B cholesterol
C
wax
D cellulose
Answer:
cellulose
Explanation:
lipids are fats oils or waxes. cellulose is a fiber
Answer:
cellulose
Explanation:
Examples of lipids include fats, oils, waxes, certain vitamins (such as A, D, E and K), hormones and most of the cell membrane that is not made up of protein. Therefore waxes are not the answer.
Steroids are lipids because they are hydrophobic and insoluble in water, but they do not resemble lipids since they have a structure composed of four fused rings. Cholesterol is the most common steroid and is the precursor to vitamin D, testosterone, estrogen, progesterone, aldosterone, cortisol, and bile salts. Therefore steroid and cholesterol is not the answer.
Which statement correctly demonstrates the relationship between cellular respiration and photosynthesis?
A: The ATP produced by all cells during cellular respiration can be used by plant cells to produce water molecules during photosynthes
B: The glucose produced by plant cells during photosynthesis can be used by all cells to produce ATP during cellular respiration.
C: The oxygen produced by all cells during cellular respiration can be used by plant cells to produce glucose during photosynthesis.
D: The water molecules produced by plant cells during photosynthesis can be used by all cells to produce oxygen during cellular O respiration.
Answer:
your answer is B. The glucose produced by plant cells during photosynthesis can be used by all cells to produce ATP during cellular respiration.
Explanation:
Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.
Calculate the total resistance (in Ohms) of a light bulb marked 2V and 3A. Do not add units. Leave your answer as a decimal to 2 decimal places.
The total resistance of a light bulb marked 2V and 3A is 0.67ohms
HOW TO CALCULATE RESISTANCE:
The resistance of a substance can be calculated by using the formula as follows:R = V/I
Where;
R = resistance (in ohms)V = voltage (in volts)I = current (in amperes)According to this question, a light bulb is marked 2V and 3A. The resistance (R) can be calculated as follows:R = 2V ÷ 3A
R = 0.67ohms.
Therefore, the total resistance of a light bulb marked 2V and 3A is 0.67ohms.Learn more at: https://brainly.com/question/8776047?referrer=searchResults
Give two examples of types of weather that you experience where you live. Give two examples of weather you don’t experience where you live. colorado
Answer:
New Zealand
Explanation:
I live in New Zealand where it's only winter and sometimes rain. There is hardly any sunlight so I will say I lest experience summer ☀️
where does the energy used to produce atp in the light reactions of photosynthesis come from?
Answer:
I don't know it can you help me
What are the main superorders for the class Monocotyledonae?
Answer:
According to Sterm’s Introductory Plant Biology 15th edition, there are four subclasses in the class Monocotyledonae, including Commelinidae, Liliales, Alismatales, and Acorus.
which type of energy is stored in chemical compounds and released in chemical reactions
Answer:
A Chemical Energy
Explanation:
Chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat.
Answer: chemical energy
Explanation: took the test!
NEED HELP ASAP!!! WILL GIVE BRAINLIEST!!!!
Hom-ozygous tall pea plants look the same as heterozygous tall pea plants. Formulate a pollination experiment to identify whether a tall pea plant is hom-ozygous or heterozygous. Explain your answer in 3-5 sentences.
Answer:
You can cross the plant with hom-ozygote recessive pollen, and the height of the progeny will show whether the plant was heterozygous or hom-ozygous.
Explanation:
I need all the blanks this is gonna take time so I will give a lot of points
Answer:
hope the pictures help
Explanation:
hope these are right and help you to understand :). An easy way to remember these are by Apple Tree and Car Garage for DNA replication where A always pairs with T and C always pairs with G. for RNA is Apple Under and Car Garage where A always pairs with U and C with G.
Water is extremely important to the survival of all organisms found on Earth.
Water helps support life in many ways. These life providing properties of water
are all basically derived from water's ability to form Hydrogen bonds, as a result
of it being a polar molecule. Describe a typical Hydrogen bond between
Hydrogen and Oxygen.
Your answer
Answer:
Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
Explanation:
SO THE ANSWER IS (A): Water helps support life in many ways. These life providing properties of water.
POSSIBLE POINTS: 3
are made from smaller building blocks known as nucleotides. Their main function is
Two examples include
Answer:
Proteins are composed of amino Acids
Answer:
Nucleic acids are made from smaller building blocks known as nucleotides.
The main function of nucleotides: is to form polynucleotides, which are strands of genetic information that can wrap around each other to form a DNA double helix.
Explanation:
in a further experiment , the researchers add a compound to the cell growth medium that both binds and releases protons and also passes through lipid membrane membranes. predict the effect of this added compound on ATP production by the cells
Answer: I would need more context my good sir please tell me the full context and I’ll be able to give you full answer :)
Explanation:
the breakdown of glucose is linked to cellular work by a chemical driveshaft known as
Answer:
The breakdown of glucose (C6H12O6) has a free-energy change of -686 kcal per mole of glucose decomposed. - Catabolism is linked to work by a chemical drive shaft: ATP. To keep working, a cell must regenerate its supply of ATP from ADP and inorganic phosphate.
Explanation:
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