Has anyone done aqa a level biological molecules exampro exam paper

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Answer 1

Answer:

No sorry

Explanation:


Related Questions

How does DNA in cells determine an organisms complex traits

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Answer:

DNA contains codes for proteins, which are necessary for the growth and functioning of an organism. DNA separates into long single strands that make up each part of an organism. DNA produces the energy an organism needs in order to grow.

Explanation:

A student observed a palisade cell using a microscope. The microscope had four objective lenses, each with a different magnification. Which objective lense should the student use?

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Answer:

x4 objective

Explanation:

The student should use the x4 objective lense in order to be able to observe the palisade cell of a leaf.

The palisade cells are located below the cuticle and the epidermis of the leaf and the x4 objective will provide the largest field of view for adequate study by the student. The x4 objective is also easier to focus compared to the lower objectives.

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.

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Answer

82

Explanation:

i think

Answer:5b

Explanation:itchy

If a strand of DNA has 35% A, what percent will be T?

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Answer:

65%

Explanation:

(pic attached) can anyone help me?

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Muscular and Skeletal

1. What is the function of the cell membrane? ___________________________________________
2. Explain how the cell membrane maintains homeostasis. ___________________________________
__________________________________________________________________________________

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Answer:

Proteins in the cell membrane include cell-surface markers, receptor proteins, enzymes, and transport proteins.

One is to transport nutrients into the cell and also to transport toxic substances out of the cell.

Explanation: I hope this helps

what is empty space that is free of matter

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Outer space is an empty space that’s made up of gases, electromagnetic radiation, magnetic fields, neutrons and dust

Explain how coupling reactions allow a cell to capture the free energy of glucose oxidation rather than allow it to escape to the environment through heat

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Answer:

This reaction is endothermic, therefore the energy uptake will be the main pillar of metabolism, in addition, the phosphorylation energy will always be used for the cell, on the other hand, in the case of phosphorylation, reverse effects will be seen, and this is when a I play an enzyme called kinase.

On the other hand, the intake or capture of energy in the form of energy currency is understood as the medium GIVES energy to the cell, it captures it and is not exothermically released in the form of heat.

Explanation:

These processes happen because of it at postpondrial moments, where the insulin hormone is high and it is sought to phosphorylate glucose to retain it inside the cell so that it does not dissipate exothermically.

This is the mechanism by which the human generates energy reserves of complex carbohydrates such as glycogen.

True or False...The Stereoscope/Dissecting Microscope is used to view small specimens.

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i guess the statement is false

Which mutation results in the mutated DNA sequence having more or less,
nucleotides than the original?
Silent
Nonsense
Missense
Frameshift

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Answer:

Frameshift

Explanation:

Mutations are randomly-occuring changes that occur within the genetic code, DNA  due to errors within replication. DNA molecules are long-chain, helical macromolecules that store genetic information They are made up of varying sequences of monomers called nucleotides. which form base pairs and sequences of codons in a reading frame, which gives instructions for protein formation.

Single nucleotide polymorphisms are common, and often result in no changes in amino acids, as silent mutations. Some errors add a random nucleotide (SNP) that results in a premature stop codon, called nonsense mutation. Missense mutations are SNPs that change the sequence of codons resulting in a different amino acid.

Frameshift mutations result from insertions or deletions of nucleotides not divisible by 3. This results in more or less nucleotides needed for a codon and disrupts the reading frame- this results in a different translation of proteins

a substance witha PH of 6 is called A. suspension B. base C. acid D. Water. and why​

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Answer:

rom the oxygen atom being at one end of a water molecule and the ... b. The attraction between the hydrogen atom on one water molecule and the ... an example. c. A hydrogen bond is stronger than a covalent bond. d. They are the Water SUBSTANCES IN SOLUTIONS. Acids, Bases, and pH

RED HAIR IN HUMANS……
PLEASE HELP ILL PUT U IN BRAINLIEST

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Answer: A B E

Explanation:

It’s A B and E hope this helped!

what does earth have that makes it different from other planets

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Answer:

Life, water, huge population of living organisms, biodiversity of species.

Explanation:

Earth is the only planet in our solar system that can maintain living organisms. It is the only planet in our solar system that is suitable for humans and animals to live on. Only planet with water suitable for a human/animal to drink. Many different types of species and organisms live on earth. And there is a large amount of living organisms living on earth.

Hope this helps!

WILL GIVE BRAINLIEST!!!!!!
An amino acid is to a polypeptide as:

glycogen is to glucose.

testosterone is to a steroid hormone.

a phospholipid is to a plasma membrane.

a nucleotide is to a nucleic acid.

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Answer:

I think it's D I could be wrong but that's what I'm thinking

Answer:

The correct answer in Option B.

The analogy pertains to the building blocks or monomers of biomolecules, with the monomer preceding the polymer....

plz mark brainliest

What causes a volcanic eruption?

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When a part of the earth's upper mantle or lower crust melts, magma forms. ... Although there are several factors triggering a volcanic eruption, three predominate: the buoyancy of the magma, the pressure from the exsolved gases in the magma and the injection of a new batch of magma into an already filled magma chamber.

What is a component of amino acid not contained in starch?

Amino acids contain hydrogen.

Amino acids contain nitrogen.

Amino acids contain oxygen.

Amino acids contain carbon.

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Answer:

Amino acids contain nitrogen.

What is the main job of the muscular system

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Create movement by relaxasion and contruction

Answer:

The muscular system creates movement

,it protects the organs

,the cardiac muscle pumps blood

,smooth muscle aids digestion

, and smooth muscle ensures blood flow

Explanation:

How many neutrons does Phosphorus have? Use the diagram below to help find the amount:

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Answer:

16

Explanation:

Describe how bacteria have become resistant to treatment. ​

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Answer:

Explanation:

Bacteria gene will mutate and this trait will be passed along to the offspring. This allows them to withstand treatment.

Which question can be used to evaluate reliability of a source?

“Do these results support the author's own opinion?”

“Is this data challenged by anyone in the public?”

“Is this research relevant to me?”

“Who was paid to do this research?”

Answers

Answer:

Do these results support the Author's own opinion?

Explanation:

The question can be used to evaluate the reliability of a source is Do these results support the author's own opinion?

In sources (books, articles, etc), reliability implies the information of a source can be trusted. This occurs if:

All the information is based on factsThe information is not manipulated by the author's opinion or interests

In this context, it is expected the information of the source is objective rather than influenced by the author's opinion. Therefore, one way to check the reliability of a source is "Do these results support the author's own opinion" because if the information is manipulated by a personal opinion, the source is not reliable.

Also, other questions are not appropriate because they are related to other aspects such as relevance, not reliability.

Learn more in: https://brainly.com/question/11616885

Why is DNA in this world?

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So we can all be identified

Answer:

According of what I remember

DNA is vital for all living beings even plants. It is important for inheritance, coding for proteins and the genetic instruction guide for life and its processes. DNA holds the instructions for an organism's or each cell's development and reproduction and ultimately death.

This list shows cellular components which two cellular components are unique only to eukaryotes

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I don’t see a list, but I hope this helps.

Eukaryotes include plant and animal cells. Eukaryotes have a membrane-bound nucleus that contains the DNA of the cell, whereas prokaryotes have free floating DNA.

Prokaryotes lack mitochondria, a nucleolus, and a nucleus. Eukaryotes contain all of these along with other unique organelles, such as the chloroplast in plant cells, and the endoplasmic reticulum and Golgi apparatus in animal cells.

what is the percentage of thymine in human ?

Answers

Answer:

29.4% or rounded 29%

Explanation:

Thymine is a compound which is one of the four constituent bases of nucleic acids. A pyrimidine derivative, it is paired with adenine in double-stranded DNA.

Hope this helps ya!!

For example, in humans, there’s approximately: 30.9 percent Adenine. 29.4 percent Thymine. 19.8 percent Cytosine.

Which statement about the genetic traits of humans is true?
O Visible traits depend on the dominant and recessive forms of genes from each parent.
O Recessive forms of genes are always visible.
Dominant forms of genes are always inherited from each parent
O Visible traits are the same for each member of a family.
Question 11

Answers

A hereditary trait is one that is genetically determined. Inherited traits are passed down from parent to child according to the rules of Mendelian genetics. Most traits are not strictly determined by genes, but rather are influenced by both genes and the environment....

Explanation:

The characters that offspring inherits from its parent is called genetic traits. It passes from parent to child in the form of a genome inside the cell nucleus.

The correct statement about the genetic traits of humans:

Option A. Visible traits depend on the dominant and recessive forms of genes from each parent.

This can be explained as:

Recessive traits are not visible in the presence of dominant traits and get masked.

The dominant trait does not always get transferred from each parent. Even a single parent can pass a dominant allele.

Visible traits are not the same and common for family members as crossing over and recombination occurs.

Therefore, dominant and recessive allele from parents decides the phenotype.

To learn more about genetic inheritance follow the link:

https://brainly.com/question/25301436



The atomic number of carbon is six, which means that a carbon atom has six protons. Carbon has three

naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. Which of these statements are true

about carbon and its isotopes? Select all that apply.

A. All carbon atoms have six neutrons.

B. All carbon atoms have six protons and six electrons.

?

C. Atoms of all carbon isotopes have either more than 6 electrons or fewer than 6 electrons.

D. Atoms of some naturally occurring carbon isotopes may have six neutrons.

E. Atoms of some naturally occurring carbon isotopes may have twelve neutrons.

Feed

Answers

Answer:

B. All carbon atoms have six protons and six electrons.

D. Atoms of some naturally occurring carbon isotopes may have six neutrons

Explanation:

Isotopes are atoms of the same elements having same atomic number but different atomic masses.

Atomic number is the number of protons (or electron number in neutral atoms) present in the atomic nucleus of the atom.

Atomic mass number is the sum of protons and neutrons present in the nucleus of the atom.

Considering the options above from the above definitions:

A. All carbon atoms have six neutrons is false because carbon-12, carbon-13 and carbon-14 has 6, 7 and 8 neutrons respectively.

B. All carbon atoms have six protons and six electrons is true because the atomic number of carbon is 12.

C. Atoms of all carbon isotopes have either more than 6 electrons or fewer than 6 electrons is false because atoms of all carbon isotopes have six electrons.

D. Atoms of some naturally occurring carbon isotopes may have six neutrons is true because atoms of carbon-12 have six neutrons.

E. Atoms of some naturally occurring carbon isotopes may have twelve neutrons is false because none of carbon-12, carbon-13 or carbon-14 have twelve neutrons.

Answer:

the answer is b and d

Explanation:

2. An atom consists of 21 protons 22 neutrons and a number of electrons which
information will be MOST helpful in determining the atom's identity
The number of protons and neutrons
The number of protons
The number of electrons
The number of valence electrons
CUERALL

Answers

Answer:

the number of valence electrons cuerall

I need help on this question please!

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Explanation:

single stranded

What three factors influence autumn leaf color? (pink)

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Answer: Three factors influence autumn leaf color-leaf pigments, length of night, and weather, but not quite in the way we think.

what explains why water moves from the roots to the leaves of plants

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The cohesion – tension theory of sap ascent explains how how water is pulled up from the roots to the top of the plant. Evaporation from mesophyll cells in the leaves produces a negative water potential gradient that causes water and minerals to move upwards from the roots through the xylem.

Answer: The word you are looking for is cohesion

Explanation.it is important for moving water from the roots to leaves

PLEASE PLEASE ANSWER ASAP
How is photosynthesis and cellular respiration related?

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Answer:

They go hand in hand as a cycle.

Photosynthesis converts carbon dioxide and water into oxygen and glucose. Glucose is used as food by the plant, and oxygen is a by-product. Cellular respiration converts that glucose and  oxygen into water and carbon dioxide, which then go through photosynthesis again.

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