Answer:
Thylakoids DNA and ribosomes are all components found in chloroplast of the plant cell. Chloroplast is the double membrane-bound organelle present in plants. Thylakoid sheets are present in chloroplast which contains a pigment called chlorophyll that absorbs sunlight and helps in photosynthesis.
These thylakoids are present in stroma which is the fluid-filled space in chloroplast and contains many enzymes, ribosomes, and DNA of chloroplast. The DNA of the chloroplast is circular and ribosomes are 70s type which resembles the prokaryotic cell.
Many thylakoids stacks together to form granum and many granum together called grana which used to perform the light-dependent photosynthesis inside the chloroplast. Therefore, both thylakoid DNA and ribosomes are found in chloroplast.
A chloroplast, an organelle present in the cells of plants and other photosynthetic creatures, contains thylakoids, DNA, and ribosomes. Chloroplasts are in charge of transforming solar light energy into chemical energy that can be utilised by the cell.
The membrane-bound thylakoids are the parts of the chloroplast where photosynthesis occurs. The genetic material called DNA, which is contained in chloroplasts, contains the instructions for making proteins and other components required for photosynthesis.
The chloroplast's ribosomes are the protein-producing organelles that employ DNA instructions to create the proteins required for photosynthesis. These elements function as a unit to supply the cell with the energy it requires to survive. Chloroplasts are essential.
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When rinsing a buret after cleaning it with soap and water, should the rinse be dispersed through the tip or the opening on the top?
The buret tip contains cleaning water, which has the potential to change the titrant's concentration. As a result, it is recommended to pour the rinse solution from the buret's tip 2–3 times.
What are the different uses of buret?A burette is a laboratory tool frequently used in chemical and industrial testing, particularly for the titration procedure in volumetric analysis, to dispense and quantify varying volumes of liquid or occasionally gas.
Solution is delivered using a buret in precisely calculated, variable volumes.
Burets are mostly used for titration, which is the process of delivering one reactant at a time until the exact end point of the reaction is reached.
Rinse the buret's tip with water from a wash bottle, then gently pat it dry. If your buret is leaking, wait a minute and look for solution on the tip. Before taking an initial volume reading, the tip needs to be dry and clean.
Therefore, it should be dispersed through the tip.
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Where would you expect to find burrowing animals?
A. only in the temperate grasslands
B. only in the tundra
C. in a wide variety of biomes
D. only in the desert
Burrowing animals can be found in a wide variety of biomes, not just in one specific type of biome. The correct answer is option C.
Biomes are large regions of the world that are characterized by their distinctive climate, vegetation, and wildlife.
Burrowing animals, such as groundhogs, prairie dogs, and rabbits, create tunnels and burrows in the ground for shelter and protection. They can be found in a range of biomes, including grasslands, forests, deserts, and Tundra's.These animals use their burrows for shelter, protection, and to find food. The presence of burrowing animals can have a positive impact on the soil and ecosystem, as they create tunnels that help aerate the soil and provide homes for other animals.In conclusion, burrowing animals can be found in a wide variety of biomes, including grasslands, forests, deserts, and tundra's. Option C is the correct answer.
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Pesticides are helpful for increasing the food supply. Which use of pesticides is most dangerous for humans?
Answer:spreading pesticides with airplanes
Explanation:
Mildred is a 74-year-old woman in good health. when asked whom she expects to take care of her when she can no longer care for herself, mildred (like most elderly americans) expects that she will be taken care of by her __________.
What process is similar in both fermentation and cellular respiration?
A) aerobic ATP production
B) electron transport chain
C) glycolysis in the cytoplasm
D) hydrogen ion pumping
The right answer is C) glycolysis in the cytoplasm .
*Glycolysis produces pyruvate, a molecule able to cross the envelope of the mitochondria where it undergoes complete oxidation during the Krebs cycle (aerobic). This oxidation in the mitochondrial matrix is accompanied by the production of reduced R'H2 compounds and carbon dioxide, which must be rejected by the cell.
*The fermentation occurs in a medium without oxygen, an anaerobic medium. This metabolism replaces cellular respiration and allows, following glycolysis, to recycle reduced R 'transporters (R'H 2).
Small reminder, glycolysis is the degradation of a molecule of glucose into two molecules of pyruvate. This is the starting point of fermentations
For water to travel across the cell membrane at a substantial rate, the water molecules travel through protein channels
known as aquaporins.
Which medical breakthrough is most likely to appeal to an overweight person?
Which accessory organ of the digestive system is responsible for almost 200 known functions?
The thresher and irrigation practices were two innovations that were created during the first agricultural _____ from 1862 to 1875.
Answer:
revolution.
Explanation:
Final answer:
The thresher and irrigation practices are innovations of the first agricultural revolution from 1862 to 1875, part of the broader Industrial Revolution that introduced significant changes in agriculture, including the use of gasoline-powered farm tools.
Explanation:
The thresher and irrigation practices were two innovations that were created during the first agricultural revolution from 1862 to 1875. This period, which overlapped with the Industrial Revolution, brought about a significant change in agricultural practices. Innovations such as gasoline-powered farm tools, including tractors, seed drills, threshers, and combine harvesters, revolutionized farming. These advancements allowed farmers to cultivate larger fields with a single crop, increasing their efficiency and productivity.
Such changes also followed earlier agricultural improvements, dating back to the introduction of basic tools around 2500 B.C., and continued advancements such as the introduction of fertilizers and three-field crop rotation techniques in the middle ages. The influence of technological innovation in agriculture eventually led to an increased capacity to satisfy the growing food demands of rising populations.
Inventions such as the seed plough by Jethro Tull and the concept of crop rotation by Charles Townsend in the 18th century paved the way for these significant shifts. The idea was to maximize productivity and cope with the ongoing demands of population growth. These innovations also supported America's rise as a major food exporter during World War I and the 1920s. Machine-powered irrigation systems further underscored the mechanization of agriculture, enabling farmers to cultivate larger areas and enhancing the reliability and quality of crop production.
Which process produces a greater number of offspring? A) chromosome duplication. B) asexual reproduction. C) gamete formation. D) sexual reproduction
The _______ mater is the membrane that covers the surface of the brain.
a. pia
b. periosteal
c. arachnoid
d. dura
Lenny drank a 5-ounce glass of wine and two 12-ounce bottles of beer during dinner. how much pure alcohol did he consume
The ________ is the area monitored by a single receptor cell.
Which food is a rich source of fiber?
a.honey
b.corn oil margarine
c.whole-wheat bread
d.farm-raised salmon?
What organelle was the thin white layer around the egg (keeps the outside out and the inside in)
What do alzheimer's parkinson's and mad cow disease have in common?
From a sitting position, unbend the knee and bring one foot up to the level of the knee. this is
Identify the organelles in the cell to the right.
A: _____
B: _____
C: _____
D: _____
E: _____
F: _____
A- Vacuole
B- Chloroplast
C- Cell membrane
D- Golgi bodies
E- Smooth and rough endoplasmic reticulum
F- Cell wall
This is a structure of a plant cell which unlike animal cell has a cell wall as well as plasma membrane. It also contains large vacuoles present in the center of the cell. The green color of the plants is due to the presence of chlorophyll which is present in an organelles called chloroplast.
Answer: here are the correct answers
Explanation:
A
✔ vacuole
B
✔ chloroplast
C
✔ cell membrane
D
✔ Golgi apparatus
E
✔ endoplasmic reticulum
F
✔ cell wall
a whelk is a herbivore or carnivore or a omnivore
Which of the following is not a way humans have directly impacted coral reefs?
Answer:
algae farming
Explanation:
How do earths layers interact with each other
Which of the following elements is the most reactive?
Potassium
Lithium
Sodium
Rubidium
Answer: Option (d) is the correct answer.
Explanation:
It is known that reactivity of atoms increases on moving down the group. This is because on moving down the group there is also increase in number of shells.
As a result, outer shell electrons move away from the nucleus and thus force of attraction between the nucleus and electrons decreases.
Hence, it is easy to remove the electrons from outermost shell and thus reactivity of atom increases.
Therefore, we can conclude that the given elements are group 1 elements and largest of them is rubidium. Thus, out of the given options, rubidium element is the most reactive.
The most reactive element among the options provided is potassium, the correct option is (a).
Potassium is the most reactive due to its lower position in Group 1 of the periodic table. Reactivity in alkali metals increases down the group because the outermost electron is further away from the nucleus, making it easier to lose and engage in chemical reactions.
As a result, potassium readily reacts with water and oxygen, vigorously producing hydrogen gas and metal oxides. Due to its high reactivity, potassium is stored in mineral oil to prevent rapid oxidation. Additionally, its reactivity is harnessed in various industrial and laboratory processes, the correct option is (a).
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The complete question is:
Which of the following elements is the most reactive?
a. Potassium
b. Lithium
c. Sodium
d. Rubidium
What simple molecule reacts with itself to form a disaccharide?
The stomach uterus and bladder are lined with what
Answer: Smooth Muscles
After a natural disaster such as a hurricane or tornado, what will happen in the damaged ecosystem?
Answer:
Depending on the type of natural disaster, the ecosystem will be more or less damaged.
Explanation:
After a huracane or tornado the balance or homeostasis of the ecosystem will be very damaged. Biotic (all living organisms) and abiotic (non-living organisms) will be detroyed, killed, relocated and /or lost. Due to this situation, it will take a while for the ecosystem to recover.
Depending on the damage of the natural disaster and the capacity of recovery ( resilence), this ecosystem will take long time or short time in being recuperated. In terms of nature, primary species will arrive first, then secondary, and this "re-poblation" will promote the recuperation of the ecosystem.
In the water diffusion over a membrane activity, what substance was actually able to pass through the membrane?
What percent of the total iron content of a normal diet is heme iron ?
A surgical connection between blood vessels or the joining of one hollow or tubular organ to another is called ________.
Explain how the structure of an enzyme makes that enzyme specific
Enzyme specificity lies in its structure, particularly its active site, which is unique and suitable for a specific substrate. The enzyme structure changes to accommodate its substrate on binding, a phenomenon called 'induced fit'. However, some enzymes show flexibility and can act on several different substrates.
Explanation:The specificity of an enzyme is determined by its structure, particularly at the active site. This is the region of an enzyme where the substrate binds and the chemical reaction it catalyzes takes place. The active site contains a unique combination of amino acid residues or side chains that create a specific chemical environment suitable for binding with a specific substrate. This is akin to a jigsaw puzzle where the pieces fit together perfectly.
The interaction between an enzyme and its substrate is often described by two models: the 'lock-and-key' hypothesis and the 'induced fit' hypothesis. The 'lock-and-key' hypothesis suggests that the active site and the substrate are complementary to each other, fitting together like a key in a lock. The 'induced fit' hypothesis suggests that the enzyme structure is flexible, adjusting to accommodate the substrate. This adjustment makes the active site an even better fit for the substrate, a bit like a glove moulding to the shape of a hand inserted into it.
Despite this specificity, there can be some flexibility as well. Some enzymes are capable of acting on several different structurally related substrates. Therefore, there is a specifically matched enzyme for each substrate and thus, for each chemical reaction.
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Enzymes are specific due to their unique active sites that fit substrates like a lock and key. The induced fit model describes how enzymes can slightly adjust their shape to bind substrates more tightly.
Enzymes are highly specific biological catalysts due to their three-dimensional structure. The specificity of an enzyme is primarily attributed to its active site, which has a unique shape that fits only specific substrate molecules, much like a lock and key.
This model suggests that the enzyme (lock) can only be activated by a substrate (key) that exactly fits its shape.Another model is the induced fit model, where the enzyme changes shape slightly after binding the substrate to achieve a tighter fit. This adaptability allows for better alignment of the enzyme's catalytic site with the chemical bonds in the substrate, facilitating the reaction. The specific arrangement of amino acids around the active site creates a favorable environment for the reaction, enhancing the enzyme's effectiveness.Overall, the enzyme's structure is finely tuned to its specific substrates, enabling precise catalytic activity essential for various biochemical reactions.
How do floating disks correspond to the rate of photosynthesis?