Answer:
The stroma is the watery part found in the inner membrane, which contains circular DNA molecules, RNA, ribosomes, lipids, granules of starch, among other substances. The chloroplast genetic process and photosynthesis reactions take place in the stroma. Thylakoids are flattened sacs, or vesicles, that form part of the inner membrane structure of the chloroplast to initiate the light-dependent photosynthesis reaction.
Explanation:
Chloroplasts are typical and exclusive organelles of plant cells that possess chlorophyll. It also has a double membrane (external and internal) and between them an intermembrane space. The inside is filled with a gel called a stroma. The stroma surrounds the thylakoid and grana within the chloroplast. It presents a DNA independent of the nucleus and plastoribosomes. Immersed in the stroma, there are flattened sacs called thylakoids or lamellae, the interior of which is called lumen. Thylakoids can spread throughout the stroma or stack in bundles called grana. Enzyme systems are located in the membrane of grana or thylakoids that capture energy from the sun and carry out the transport of electrons to form ATP.
What is the similarities between a molecule and macromolecule
Explanation:
The molecule is the smallest unit of the substance that retains its characteristic properties. The macromolecule is such a unit but is considerably larger than the ordinary molecule, which usually has a diameter of less than 10 angstroms (10−6 mm).
Answer:
The molecule is the smallest unit of the substance that retains its characteristic properties
The macromolecule is such a unit but is considerably larger than the ordinary molecule which usually has a diameter of less than 10 angstroms
Explanation:
In pea plants, yellow seeds are dominant over green seeds. What would be the
expected genotypic ratio in a cross between a plant with green seeds & a plant that
is heterozygous for yellow seed color?
A. 1:1
B. 1:3
C. 1:2:1
D. 4:1
The expected genotype ratio is 1:3.
The genotype of an organism is the sum total of the gens that the organism received from its parents. The genotype determines the traits of an organism (phenotype).
Let the dominant gene be R and the recessive gene be r then we have a cross between RR and Rr. The expected genotype ratio is 1:3.
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How many times longer is DNA than it is wide?
Answer:
About 200 km 7.
DNA is approximately six times longer than it is wide after measurements.
DNA is a 2-nanometer-diameter double-stranded molecule. Rise per base pair is 0.34 nanometers. Divide length by width to calculate length-to-width ratio. The length-to-width ratio is 6:1 due to DNA's stable diameter and base pair distance. DNA is six times longer than broad.
DNA stores and encodes genetic information efficiently in this elongated shape. DNA molecules can range from a few hundred base pairs in bacterial genomes to millions or billions in sophisticated animals. DNA stores and transmits life's genetic blueprints because it's longer than it is wide.
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Review the Protein to Trait Example. How did the differences in proteins lead to different traits for this feature?
Answer:
Proteins are responsible for shaping and growth of an organism.
Explanation:
The differences in proteins lead to different in traits because it is the protein that determines the trait. The gene's sequence is like language that instructs cell to manufacture a particular protein that is necessary for the growth and development of the organism. These proteins shaped the structure of organisms so we can say that difference in traits occur due to difference in their proteins.
3. Which of the following types of molecules is found in genetic material?
A.cellulose
B.enzymes
C.lipids
D.nucleic acid
Answer:
D. Nucleic acid
Explanation:
There are two types: DNA and RNA
DNA stands for Deoxyribonucleic acid
RNA stands for ribonucleic acid
Plant cells have some organelles that animal cells do not. Check all organelles that ONLY plant cells have.
A
chloroplast
B
nucleus
C
cell membrane
D
cytoplasm
E
cell wall
F
mitochondria
Answer: Plant cells only have chloroplast and a cell wall. Which is A and E.
10. Feedback loops are ___
systems of information.
1.Isolated
2.open
3.closed
4.positive
Many fungi play a critical environmental role as _______, breaking down organic material into nutrients for the soil and other organisms.
Find the length of the diagonal of a square whose side
is 10 cm
Answer:
14.14 cm
Explanation:
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here’s a easy 10 points please help !!!
The second answer from the top
Which blood vessel contains valves?
A renal artery
B renal vein
Carteriole
D capillary
Answer:
B
Explanation:
veins contain valves that ensure blood flows in only one direction.
Which of the following is a reason a cell may divide:
A- The cell has become damaged
B- The cell wants to divide
C- Both a and b
D- Neither a nor b
Explain the difference between homology and analogy using a wolf, a whale, and a shark:
Answer:
Explanation:
Analogy refers to traits or structures like body shapes, fins which evolved independently that are similar in organisms that are not related by the same common ancestor. For example dolphins and shark have similar body structures like fins but they are unrelated. Whale and shark too. Whales are mammals, sharks are fish.
Homology refers to traits or structures
posses by organisms that are related by common ancestors. Example wolf and whales.....they are both mammals.
Cells require a structure that regulates the transfer of material in and out of the cell. This structure is the –
Cells require a structure that regulates the transfer of material in and out of the cell, and this structure is the cell plasma membrane, as substances can go in or out of the cell such as oxygen, water, etc.
What is the purpose of the cell plasma membrane?The cell plasma membrane's purpose is to protect the cell from outside materials such as matrix proteins, pathogens, and so on, as well as to give the cell the proper shape and size, and at the same time it consists of many channels, pumps, etc. Through the channels, the substance can flow in and out of the cell plasma membrane, and the energy may or may not be needed for the movement.
Hence, cells require a structure that regulates the transfer of material in and out of the cell, and this structure is the cell plasma membrane, as substances can go in or out of the cell such as oxygen, water, etc.
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This is a picture of step 1 of protein synthesis. What happens in this step?
A. DNA is copied and then the new DNA strand leaves the nucleus and goes to the ribosome
B. DNA is copied to mRNA. The mRNA then leaves the nucleus and goes to the ribosome
C. RNA is copied and then goes to the nucleus tobring the code to the DNA
What is the correct term for a leaf attached by a thin stem to its parent plant?
sessile
petiolated
etiolated
pronate
The cells in your body need nutrients and other materials to stay alive. To be used by your cells, the materials must be
Compact Bone is hard and dense but, it is not solid. It is filled with holes and has small canals for blood vessels and nerves.
True
or
not?
The compact bone is hard and dense, but it is not solid; it is filled with holes and has small canals for blood vessels and nerves, which is a true fact as the compact bone is one of the dense bones present in the body.
What is the significance of compact bone?Compact bone is a dense, hard bone tissue that provides structural support and protection to the body, and it is also involved in the storage of minerals, such as calcium, which is important for the strength and density of bones. Haversian canals are present in the compact bone and contain blood vessels, nerves, and other tissues that support the bone.
Hence, compact bone is hard and dense, but it is not solid; it is filled with holes and has small canals for blood vessels and nerves, which is a true fact as the compact bone is one of the dense bones present in the body.
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Measurement of overall change in position.
Answer:
Velocity (Rate of change of position)Velocity is a vector quantity that is defined as the rate of change of position of an object with respect to a frame of reference with respect to time. Velocity is equivalent to the speed of the object along with the direction of motion.Hope this is fine for youAnswer:Displacement
Explanation:Displacement is the change in position of an object. The SI unit for displacement is the meter. Displacement has direction as well as magnitude. Distance traveled is the total length of the path traveled between two positions.
Describe temperate continental climates.
If the Carbon-14 found in a mastodon tooth went through 8 half lives, how old is the tooth? To help find the answer, use 5,000 years for the half life of Carbon-14. 8,000 years old 14,000 years old 30,000 years old 40,000 years old
Answer:
The age of the mastodon tooth is about 40000 years.
Explanation:
The presence of carbon-14 decreases exponentially in time. Let consider half-life of Carbon 14 in 5000 years. If the mastodon tooth went through 8 half lives, then we estimate its age in 40000 years.
The age of the mastodon tooth is about 40000 years.
Who was similar to the cheddar man?
what are protons and electrons are compressed into. Plz hurry
Answer:
The electrons in degenerate matter are compressed so closely together that they more-or-less behave as if the entire star is one huge quantum system. They form an electron gas, and behave very much like a highly pressurized fluid inside the star. (Protons and neutrons have their own quantum states, thank you.)
Answer:
They compress into neutrons.
what features are environmental?
Answer:
Temperature, food, pollutants, population density, light and sound
how is the function of NAD similar to that of NAD
Answer: The function of NAD+ that is similar to that of NADP+ is that each NAD+ accepts a pair of high-energy electrons. Describe glycolsis in terms of energy input, energy output, and net gain of ATP. In glycolysis, glucose is converted to molecules of pyruvic acid. ... NAD becomes NADH.
Explanation: Hope this helps :)
24. Name two types of pathways that help a body maintain homeostasis, and an example of each.
B
I
U
Font Family
Answer:
See the answer below
Explanation:
Homeostasis refers to the maintenance of relatively constant internal body processes. This is done in two ways
Negative feedbacksPositive feedbacksNegative feedback returns body processes back to normal after the process has been breached. An example is when the body temperature becomes too high or too low. At too high temperature, vasodilation of the skin's blood vessels occurs and more heat is lost to the surrounding from the skin, sweat is also produced by sweat glands and evaporation of the seat causes cooling. At too low temperature, vasoconstriction occurs leading to the conservation of more heat. The muscles also shake to generate more body heat
Positive feedback ensures that a breach of body processes reaches completion. An example is when a pregnant woman starts laboring. The increase in the amount of oxytocin in the blood leads to the contraction of the uterus consequently leading to the opening of the cervix. More and more oxytocin leads to more frequent and stronger contraction of the uterus untill the baby is born.
How could an asteroid impact have led to the extinction of dinosaurs?
Answer:
The asteroid crashed into the earth and made some water bodies violent
it is said that the asteroid was super huge and was capable of causing volcanoes, tsunamis, etc which took place all over the earth and extincted dinosours. But it is a little surprising that crocodiles who were also found at that time survived all this
Answer:
Probably the asteroid caused natural calamities
I need help with dominant and recessive genes, it doesn't really make sense to me can sombody explain how it works?
Answer:
Dominant: the genes that are expressed/ shown
Recessive: the "hidden" genes
Explanation:
If one parent has a dominant gene for brown eyes and the other has a recessive gene for blue eyes, then the offspring will have brown eyes.
Hope this helps!
You can message me if you are still confused.
Explanation:
dominant genes will always appear before recessive ones, in order for recessive genes to appear, both copies of the gene have to be the recessive one tldr for this paragraph, think of dominant genes like jackets, and recessive ones like t shirts
an example
B=brown hair gene (dominant)
b=blond hair gene (recessive)
this is an example of 2 parents, with offspring
Bb Bb <-- both parents have a copy of brown and blond hair gene, but since dominant genes appear before recessive ones, they both have brown hair
now, lets look at their possible offspring genes
BB Bb Bb bb
in order, their hair color will be
brown, brown, brown, blond
see the last one? the only reason why that child is blond is because they don't have a brown hair gene tldr of this paragraph, recessive genes will only be present if both copies of the gene is the same
with the first example, lets say its a cold day. what would you wear, a jacket or a t shirt? a jacket, obviously
but what if you only had t shirts? then you would be forced to wear that and think about your poor freezing self...
pretend the T shirt is blond hair gene, and jacket is brown hair
and the closet only holds 2 clothes
2 domiant genes will do the same thing, brown hair
1 domiant gene and 1 recessive will use the domiant gene, since domiant genes get used first, like brown hair will show even though you have a copy of blond hair gene
2 recessive genes, and only then will the recessive show, like blond hair
uwu wow this took way too long to type
When summarizing the process of transcription in a cell as a gene is used to build a polypeptide, which of these statements accurately reflects the process of transcription? You may choose all that apply.
Answer:
This question lacks options, the options are:
A) An mRNA molecule is produced in the nucleus of the cell.
B) The ribosome attaches to the DNA to build a polypeptide
C) The resulting RNA molecule is a complement of the gene on the DNA.
D) The RNA molecules contains three nucleotides in a row whose bases form
a codon.
E) A polypeptide is synthesized based on the sequence of nucleotides on the tRNA molecule.
The answers are A, C and D
Explanation:
Transcription is the first process of gene expression whereby a mRNA is synthesized from a DNA template. Transcription, which occurs in the NUCLEUS, takes place in three stages namely: initiation, elongation and termination.
- Initiation involves the attachment of RNA polymerase to the DNA molecule, inducing the unzipping of the double stranded DNA.
- Elongation involves the synthesis of RNA strand by adding complementary nucleotides based on the ones read on the DNA strand.
- Termination signals the end of the transcription process.
Based on this question and the above explanation of the transcription process, the following pertains to transcription in the nucleus:
- mRNA molecule is produced in the nucleus of the cell.
- The resulting RNA molecule is a complement of the gene on the DNA.
- RNA molecules contains three nucleotides in a row whose bases form a codon.
S. If cells of onion peel and RBC are separately kept in hypotonic solution, what will take place? Explain the reason for your answer
Answer:
Well for the onion peel, since its a plant cell...it shall gain water from the solution as it has a lower water potentail,and hence increase in size, becoming turgid and tight, with the cell wall exerting pressure to stop it from bursting.
For the RBC, its an animal cell, and shall also gain water, but since there is no cell wall to support it, it shall soon gain so much water that it shall burst becuase of the pressure, through lysis, and shall die.
Note, the plant cell does not die.