Answer:
D
Explanation:
Has anyone done aqa a level biological molecules exampro exam paper
Answer:
No sorry
Explanation:
Which 3 characteristics did Darwin observe that were slightly different in a population?
A function, breeding habits, food sources
B form, function, behavior
C behavior, form, food sources
D form, breeding habits, behavior
Answer:
B. form, function, behavior
Explanation:
What is the name for a substance that keeps
the pH in cells within the 6.5 to 7.5 pH range?
Answer: Neutral
Explanation:
“6.5 to 7.5—neutral. over 7.5—alkaline. less than 6.5—acidic, pH less than 5.5 are considered strongly acidic.“
cholesterol is synthesized by all animal cells and is an essential structural component of animal cell's membrane cholesterol is the most common steroid and mainly synthesized in the liver cholesterol also serves as a processor for several important biological compounds including all except insulin ,vitamin D, bile salts , testosterone.
Answer:
Aug 11, 2017 — Vitamin D3 is produced in the skin from 7-dehydrocholesterol by UV irradiation, 1,25(OH)2D reduces 1,25(OH)2D levels in cells primarily by Animals null for calbindin 9k (the major calbindin in mammalian abnormal vitamin D and/or calcium metabolism in some but not all of these patients (24-26). Cholesterol, a waxy substance that is present in blood plasma and in all animal tissues. it is a primary component of the membrane that surrounds each cell, and it is synthesizes bile acids, steroid hormones, and vitamin D. Cholesterol are essential energy sources and structural components of all life
Cell biologists studying the mobility of plasma membrane proteins fused mouse and human cells together, creating a heterokaryon. They then examined the localization of mouse and human proteins over time. Initially the mouse and human proteins were restricted to separate halves of the heterokaryon. Over time the mouse and human proteins mixed, with each protein eventually being present over the entire cell surface, consistent with proteins being able to move within the plane of the membrane. What techniques could have been used to examine the locations of the mouse and human membrane proteins
Answer: Fluorescence microscopy
Explanation:
A protein is substance that is the essential constituent of living cells because it forms part of its structure. They are also found in plasma membrane, where they assist substances to cross the membrane. Proteins can be:
Integral: permanently attached within the plasma membrane.Transmembrane: it spans the entirety of the cell membrane.Peripheral: are only temporarily associated to the membrane.Some integral proteins can act as cellular receptors. Other proteins are responsible for cell adhesion (binding of a cell to another cell or to a surface). On the outside of the cell membranes, attached to other proteins, are the carbohydrate chains that act as labels identifying the type of cell.
A heterokaryon is a multinucleate cell and in this experiment the scientists fuse a human cell and a mouse cell, each of them will have their own proteins. At first, the human and mouse proteins where found in separated halves of this heterokaryon. But after a while, those proteins where mixed and could no longer be identified.
A fluorescent chemical called a fluorophore is able to be absorb light of specific wavelengths and then emit light of longer wavelengths. The proteins can be modified and marked with different colored fluorophores to detect them, even if they are mixed in the heterokaryon. Then, they can be seen with a Fluorescence microscopy, to identify them through different colors.
In seedless plants, haploid gametophytes are produced from
A; diploid spores that undergo mitosis.
B: haploid spores that undergo meiosis.
C; diploid spores that undergo meiosis.
D; haploid spores that undergo mitosis.
Answer: It's A!!
Explanation:
Answer:
diploid spores
In seedless plants, haploid gametophytes are produced from a diploid spores that undergo mitosis.
Explanation:
When we sleep, what happens to our body temperature?
a
It stays the same
b
It increases
c
It decreases
d
Nothing
Answer:
C, it decreases. It's natural for your body temperature to decrease during REM period of sleep.
ocean trenches are most often formed when
Answer:Ocean trenches are driven by tectonics and are most commonly found along the Pacific Ocean in a zone known as the ring of fire. They are usually formed at the boundaries of convergent plates, at a region where a continental plate submerges beneath an oceanic plate.
Explanation:
a, b, c, or d. first answer gets brainliest
The cell structure at the arrow in the picture below is present in these cells which line the airways, but are NOT present in bacteria. What is the cell structure at the arrow?
Answer:
The cell membrane
Explanation:
The arrow is pointing to the outside ¨shell¨ so to speak which is the cell membrane, bacteria do not have cell membranes
If I were to make hot cocoa which consists of chocolate syrup and milk, identify the solution
a. chocolate syrup
b. milk
c. none of the above
d. hot cocoa
The red line in this diagram represents: *
RED HAIR IN HUMANS……
PLEASE HELP ILL PUT U IN BRAINLIEST
Answer: A B E
Explanation:
Analyze: Click the FOREST tab. Click the plus (+) button for mushrooms several times. Click Advance year a few times. Select the DATA tab. How did adding mushrooms affect trees? GIZMOS.
Answer
82
Explanation:
i think
Answer:5b
Explanation:itchy
Which statement best describes what happens during translation?
Answer:
B
Explanation:
The entire process is called gene expression. In translation, messenger RNA (mRNA) is decoded in a ribosome, outside the nucleus, to produce a specific amino acid chain, or polypeptide. The polypeptide later folds into an active protein and performs its functions in the cell.
During translation, the ribosome reads the mRNA and uses the information to assemble a protein.
Translation is the second step of protein synthesis. It takes place in the ribosome, a complex structure made up of proteins and RNA. The ribosome reads the mRNA, a molecule that contains the genetic information for a protein. The mRNA is translated into a protein by a process called codon-anticodon pairing.
Codons are three-base sequences in mRNA that code for specific amino acids. Anticodons are complementary sequences in tRNA molecules that bind to specific codons. When the ribosome encounters a codon in the mRNA, it brings in the corresponding tRNA molecule. The tRNA molecule carries the amino acid that corresponds to the codon.
The amino acid is then added to the growing polypeptide chain. The ribosome continues to move down the mRNA, reading codons and adding amino acids until the entire protein is synthesized.
To learn more about translation, here
https://brainly.com/question/29979094
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The image of a slide of onion epithelial tissue observed with the low-power objective of a
compound microscope appears light and somewhat fuzzy. Which parts of the microscope should be used to improve the focus?
coarse adjustment and ocular
fine adjustment and diaphragm
ocular and nosepiece
diaphragm and 40x objective
Od
Answer:
Fine adjustment and diaphragm
Explanation:
Pls hurry and answer I’ll give brainliest
Answer:
D
Explanation:
might be wrong
mountain trekkers use alcohol thermometer, why?
Answer:
They are used rather than mercury thermomethers to in very cold religions because alcohol has lower
Explanation:
30 points, please answer question in picture :) i need help
Answer:
the answer is A
Explanation:
because 6 is where it reaches the highest point
Which pathogen is most likely responsible for causing hoof-and-mouth disease on livestock?
Answer:
D
Explanation:
A virus, because it requires a host cell to reproduce
Chromosomes that have the same structure, size and carry the same genes but different versions of that gene.
A. Identical Chromatids
B. Homologous Chromosomes
C. Centromeres
D. Heterozygous Chromosomes
Answer:
heterozygous chromosomes
Explanation:
They're both the same size and the same gene, but their different versions
What are the two endocrine organs that work together to control blood calcium levels?
Answer:
:)))))
Explanation:
:::::::::::::::::::::::))))))))))))))))))
Which best describes the process of insertion?
A.occurs when part of a chromosome breaks off and is placed into the middle of another chromosome
B.occurs when part of a chromosome breaks off and reattaches backward on the same chromosome
C.occurs when part of a chromosome breaks off and does not reattach
D.occurs when part of a chromosome breaks off and attaches to another chromosome
Answer:
A.occurs when part of a chromosome breaks off and is placed into the middle of another chromosome
Explanation:
Edge 2020
Answer:
A
Explanation:
EDGE2021 :-)
Have a nice day! ^-^
please help me, i dont like this
Answer:
yes this is true
Explanation:
have a nice day!
PLEASE HELP!!!? Are humans an invasive species? Why or why not. GIVE TWO PIECES OF EVIDENCE TO SUPPORT YOUR OPINION.
Answer:
I think yes, humans are an invasive species.
Explantation:
I think humans are an invasive species because they are everywhere, and very few places in the world do not have humans. Humans are in control of the planet because of their number. Humans are not going to be extinct ever. They are always going to be here on earth. If somebody finds new land, they make a base/camp and send other people to live there and to populate it. Like in North america, settlers came and sent men to live there. They hunted animals and set up homes. Then, more and more people came and soon all that is left is a over populated land with citys and cars and humans everywhere.
I hope this helps. :)
An animal cell: the human body. Different but also alike. Your brain is the control center of your body. What is the control center of the animal cell?
Answer:
the nucleus is the center of the animal cell
What are three methods for detecting radioactively labeled DNA in an experiment?
Answer:
Limitations. detect low abundance DNA binding proteins from lysates. test binding site mutations using many probe configurations with the same lysate. test binding affinity through DNA probe mutational analysis. non-radioactive EMSA possible using biotinylated or fluorescently labeled DNA probes.
Explanation:
Answer:
Proteins interact with DNA through electrostatic interactions (salt bridges), dipolar interactions (hydrogen bonding, H-bonds), entropic effects (hydrophobic interactions) and dispersion forces (base stacking). These forces contribute in varying degrees to proteins binding in a sequence-specific or non–sequence-specific manner.
Explanation:
What is the correct answer?
Answer:
The correct answer is A
PLZZZZ HEELLLPPPP need sooon
Answer:
1.ecological
2.ecological?
3. genetic
4.
5.
6.ecological
7. genetic
8. species
9. ecological
Explanation:
here are some sorry i was trying to go fast
What are the major parts of one molecule of ATP? (3 parts)
Answer:
Adenine ,ribose, covalent bonds
Explanation:
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An ATP molecule consists of three parts. One part is a double ring of carbon and nitrogen atoms called adenine. Attached to the adenine molecule is a small five-carbon carbohydrate called ribose. Attached to the ribose molecule are three phosphate units linked together by covalent bonds.