Cellular respiration involves a series of chemical reactions. Which of the following is a primary way that enzymes affect these reactions?A. They decrease the pH of the products.
B. They increase the rate of the reactions.
C. They take the place of oxygen as a reactant.
D. They change the location of the reactions in the cell.

Answers

Answer 1

Answer: Cellular respiration involves a series of chemical reactions. The enzymes increase the rate of the reactions. So option “B” is the correct option as far as the given question is concerned. The reactions that are catalysed by enzymes actually helps the organism to grow, respond to various changes in the environment, reproduce and continue maintaining their own structures. Cellular respiration is also considered a part of the metabolism process. This process actually helps in carrying the oxygen through the blood.

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A scientist investigated DNA replication in two groups of cells, labeled A and B. She injected radioactively labeled nucleotides into cells of each group and allowed DNA replication to begin. When replication was halfway completed, she injected a drug into the cells to stop replication. She then examined the cells to determine the distribution of the newly-synthesized DNA. She found each cell of group A had many segments of new DNA in its nucleus, while each cell of group B had a single segment of new DNA in its cytoplasm. What can the researcher conclude about the cells?
A light microscope that makes the specimen appear light on a dark background is called a(n) _____.

the area in which surface water flows into a single stream is called a. a delta b. a headwater c. a watershed d. a stream system

Answers

Answer:

Option C, a watershed

Explanation:

A catchment area also known as water shed is a parcel of land where all streams combine to form one single stream. These numerous stream combine into one single stream in order to drain into a common/single drainage point i.e either a sea or ocean. It is also known as a drainage basin. Along with river streams, water from from all different precipitation mode with in a region also drain into the single stream in a watershed

Hence, option c is correct.

C. a watershed is the answer

In a reverse reaction, products are formed from reactants and reactants are formed from products. When they yield the same amount, _____.Chemical equilibrium is reached

It is called the law of mass action

Activation energy is released

Answers

The statement that would complete the sentence would be the first. In a reverse reaction, products are formed from reactants and reactants are formed from products. When they yield the same amount, chemical equilibrium is reached.

Answer:

Chemical equilibrium is reached

Explanation:

Chemical equilibrium refers to the condition when the rate of formation of the product by the forward reaction is the same as the rate of formation of reactants by the reverse reaction. This leads to a balance between the concentration of reactants and products in the system and is called chemical equilibrium.

What is one difference between DNA and RNA?A) Only DNA contains the base adenine.
B) Only RNA contains the base guanine.
C) Only RNA contains the sugar fructose.
D) Only DNA contains the sugar deoxyribose.

Answers

The one difference is D) DNA contains the sugar deoxyribose

Brothers, Patrick and Michael, do not look very much alike. Patrick has green eyes and blond, curly hair like his mother. Michael has blue eyes and dark brown, straight hair like his father. These directly observable characteristics are a) phenotypes. b) genotypes. c) chromosomes.d) DNA.

Answers

The correct answer is A. Phenotypes

Explanation:

In genetics, the observable traits of an organism that includes behavior, physical traits, biochemical properties, etc. are known as phenotypes. These traits depend on both the genes of the organism (genotype) and the influence of the environment. Due to this, organisms of the same species with a similar genotype can display different phenotypes. This occurs in the case of Patrick and Michael as their observable traits or phenotype is different despite they are brothers. Thus, the observable characteristics are the phenotypes of an organism.

Answer:

Explanation:

A concept that there is a specific time in an organism's development during which external factors have a unique and irreversible impact is: A. ethology
B. equifinality
C. critical period
D. zone of proximal development

Answers

Answer:

critical period

Explanation:

During the lifespan of an organism, there is a developmental stage during which the environmental stimuli have the greatest impact on the nervous system and hence, the external factors have an irreversible impact on the organism's development. This is termed as the critical period.
During the critical period a person develops several essential life skills such as vision, first language, hearing, etc. and a failure to receive the external factors during this critical period, may make it nearly impossible to learn those life skills at a later stage.
The critical period usually begins during the prenatal stage and continues until adolescence whereas closes at around adulthood.
During the critical period, the cellular events, as well as sensory experiences, need to coincide to function successfully and generate an impact.

Plants are able to release water back into the atmosphere by a process called _____. evaporation precipitation transpiration sublimation

Answers

Transpiration is the process in which plants release water back into the atmosphere in the form of water vapor. In simplest terms, transpiration is the evaporation of water from plant leaves. This process occurs from the roots of the plants that carry moisture to the undersides of the leaves and is then released through the pores of the leaves back into the atmosphere. About 10% of the moisture in the atmosphere is released by plants through this process; while the other 90% come from bodies of water.

Answer:

Transpiration

Explanation:

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