UNAM BIOLOGY Simulator Exam 2024 Higher Level with FREE PDF Answers

Is not correct.

B) Remember that Urey and Miller did not propose the Chemosynthetic Theory and it does not postulate the lack of methane in the primitive atmosphere.

C) Remember that Haldane and Miller did not propose the Chemosynthetic Theory and it does not postulate the lack of water in the primitive atmosphere.

D) Remember that Oparin and Urey did not propose the Chemosynthetic Theory and it does not postulate the lack of ammonia in the primitive atmosphere.

Is not correct.

A) Remember that both prokaryotic and eukaryotic cells have ribosomes.

B) Remember that both prokaryotic and eukaryotic cells have a cytoskeleton.

C) Remember that prokaryotic cells like eukaryotes have a plasma membrane.

We suggest you make a comparative table of the cellular structures between eukaryotic and prokaryotic cells.

Is not correct.

A) The definition provided does not correspond to primary and secondary production.

C) The definition provided does not correspond to the food chain.

D) The definition provided does not correspond to the water cycle.

Is not correct.

A) The mitochondria is an important organelle, but not fundamental in the cellular structure.

C) The peroxisome is an important organelle, but not fundamental in the cellular structure.

D) The lysosome is an important organelle, but not fundamental in the cellular structure.

We suggest you study the fundamental components in the cellular structure.

Is not correct.

A) Remember that ATP is not an inheritance molecule.

B) Remember that ADP is a precursor molecule of ATP.

C) Remember that RNA is the messenger of heredity, so it is not the chemical basis.

Is not correct.

A) Remember that DNA does not correct the amino acid sequence of proteins.

B) Remember that DNA does not assemble amino acids.

C) Remember that DNA does not translate the sequence of nucleotides into amino acids.

Is not correct.

Remember that in each link of a food chain, up to 30% of the energy available for the next level is lost.

Is not correct.

A) Remember that, although plausible, not enough evidence has been described.

B) Remember that, although plausible, not enough evidence has been described.

C) This theory does not explain the origin of life, but rather the origin of eukaryotic cells.

Is not correct.

Remember that the child is male because he received the Y chromosome from his father, and he is color blind because he received the affected chromosome from his mother (X^d).

Is not correct.

A) Remember that to form a glucose molecule in the Calvin–Benson cycle, the fixation of 2 ATP is not required.

B) Remember that to form a glucose molecule in the Calvin–Benson cycle, the fixation of 12 NADP is not required⁺.

D) Remember that to form a glucose molecule in the Calvin–Benson cycle, 12 H fixation is not required.₂

Is not correct.

A) Remember that natural classification systems reflect kinship relationships. The color of the leaves is not a characteristic that is unique to a plant, since it can vary as it matures.

B) Remember that natural classification systems reflect kinship relationships. Leaf size is not a constant characteristic in the life of a plant.

D) Remember that natural classification systems reflect kinship relationships. The weight of the leaves is not a constant value in the life of a plant.

Is not correct.

A) Various branches of Biology describe living beings.

C) The mere creation of information is not enough without its organization and interpretation.

D) The criteria for organizing may be erroneous because they do not always consider evolutionary aspects.

Is not correct.

A) Remember that the mitochondria do not carry out photosynthesis.

B) Remember that the vacuole does not carry out photosynthesis.

C) Remember that the cell wall does not carry out photosynthesis.

We suggest you make a comparative table between autotrophic and heterotrophic cells with their respective organelles.

Is not correct.

This phrase defines a structure common to all cells: the cell membrane; However, it does not present a foundation for the Cell Theory that describes the cell as a fundamental unit (functional, reproductive or structural).

We suggest you study the principles of Cell Theory.

Is not correct.

A) The appearance of endomembranes is not responsible for the change in the atmosphere. 

B) Remember that stromatolites are older than the change in atmosphere type.

D) Remember that archaebacteria have not disappeared.

Is not correct.

A) The number of organisms together in a place does not indicate the relationships that they have with each other and with the environment. A population can have a large number of elements, as happens in some human populations without it being an ecosystem.

C) Although producer organisms are very important in an ecosystem, they do not define the ecosystem by themselves.

D) Remember that, although decomposers have a very important role in the ecosystem, since they are a substantial part of recovering chemical elements, they do not define the ecosystem by themselves.

Is not correct.

This sequence does not indicate the correct order in which the stages of aerobic respiration are performed.

Is not correct.

A) Although chromosomes are different in size, remember that they are not the same in shape.

B) Although the chromosomes are different in shape, remember that they are not the same in size.

C) The two mentioned characteristics do not correspond to sex chromosomes in humans.

Is not correct.

A) In taxonomic classification, there are no categories "taxon" or "individual".

B) In the formal taxonomic classification there are no categories "orda", "congregation" or "tribe".

D) Remember that in formal taxonomic classification there are no categories "tribe", "orda" or "clan".

Is not correct.

A) Remember that during Anaphase I the nuclear envelope is not formed.

C) Remember that during Anaphase II the nuclear envelope is not formed.

D) In ​​Anaphase I each chromosome has four chromatids, so at this stage they migrate to the poles still as chromosomes.

Is not correct.

B) Sustainable development makes it possible to avoid compromising the resources of other generations. Likewise, the solution to this problem is not sustained development.

C) Biological balance does not occur due to human development.

D) When one species dominates the ecosystem there is no ecological balance.

Is not correct.

A) Remember that the technological tools of the time did not allow the observation of structures in the nucleus, so chromosomes could not be described.

B) Remember that this postulate was generated several centuries later, as a result of the great technological advance.

D) Although the nucleus could already be observed at that time, Rudolf Virchow focused his attention on cell proliferation.

We suggest you study the scientific contributions of the authors of the Cell Theory.

Is not correct.

A) Remember that current evidence does not support the fact that the first organisms were aerobic heterotrophs.

B) Remember that current evidence does not support the fact that the first organisms were anaerobic heterotrophs.

C) Remember that current evidence does not support the fact that the first organisms were aerobic chemoautotrophs.

Is not correct.

B) Genes are discrete units, but not the smallest.

C) Prokaryotic organisms can have only RNA.

D) Mutation does not necessarily occur.

Is not correct.

A) For Charles Darwin and Alfred Russell Wallace, the variation that exists between organisms of the same species makes it possible.

B) Remember that these ideas are contrary to the Darwin-Wallace Theory.

C) Contrary to these ideas, Charles Darwin and Alfred Russell Wallace postulated the existence of common ancestors for different biological forms.

Is not correct.

A) Remember that the function of sugars is not catalytic.

B) Remember that lipids are not involved in all cellular reactions.

D) Remember that the function of nucleic acids is not activating or catalytic. 

Is not correct.

A) Remember that the shell is the outermost layer that protects the egg due to its high calcium carbonate content.

C) Remember that the amnion is not the membrane that lines the inside of the shell.

D) Remember that the yolk sac is not the membrane that lines the inside of the shell.

Is not correct.

A) Remember that the Chemiosmotic Theory does not explain the origin of eukaryotes.

B) Remember that the Chemosynthetic Theory does not explain the origin of eukaryotes.

D) Remember that the Endonucleotic Theory does not explain the origin of eukaryotes.

Is not correct.

None of the events are related to the indicated phase.

We suggest you study the phases of mitosis from the event that characterizes them.

Is not correct.

A) This phrase defines a structure common to all cells: the cell membrane; However, it does not present a foundation for the Cell Theory that describes the cell as a fundamental unit (functional, reproductive or structural).

C) This phrase defines a structure common to all cells: the nucleus or nucleoid; However, it does not present a foundation for the Cell Theory that describes the cell as a fundamental unit (functional, reproductive or structural).

D) This phrase defines a structure common to all cells: the cytoplasm; However, it does not present a foundation for the Cell Theory that describes the cell as a fundamental unit (functional, reproductive or structural).

We suggest you study the principles of Cell Theory.

Is not correct.

B) Remember that a biogeochemical cycle is not the consumption of matter by autotrophic organisms. Through biogeochemical cycles, such as carbon, nitrogen, phosphorus, etc., matter is recycled into the environment.

C) Remember that a biogeochemical cycle is not the increase of matter by active cell division. Through biogeochemical cycles, such as carbon, nitrogen, phosphorus, etc., matter is recycled into the environment.

D) Matter is not dissipated in the form of heat, but is transformed through a biogeochemical cycle such as the carbon cycle, the nitrogen cycle, the phosphorus cycle, etc., in such a way that it can be used again by others. organisms.

Is not correct.

Remember that natural selection operates on the diversity that exists in individuals of the same species, favoring the fittest, which have a greater chance of reproducing so their characteristics remain in the populations.

Is not correct.

A) Although rRNA does bind to basic proteins, generating a complementary sequence with a codon, mRNA and tRNA do not have the characteristics you selected.

B) Although mRNA is linear and contains a copy of DNA to synthesize a protein, tRNA and rRNA do not have the characteristics you selected.

D) Although tRNA has a triplet of nucleotides called an anticodon, mRNA and rRNA do not have the characteristics you selected.

Is not correct.

A) Remember that the combination 45, ME is not viable.

B) Remember that the combination 45, ME is not viable.

C) Remember that the combination 47, XX, 21 is not viable.

Is not correct.

A) Remember that, although plants carry out photosynthesis, they are not the only organisms capable of doing so.

C) Remember that heterotrophic organisms cannot carry out photosynthesis.

D) Remember that, although cyanobacteria carry out photosynthesis, they are not the only organisms capable of doing so.

We suggest you make a comparative table between autotrophic and heterotrophic cells with their respective organelles.