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TEAS 7 Science TEAS 7 Science Practice Test 2 What organelle is only associated with p...

What organelle is only associated with plant cells?

A. Cell wall

B. Ribosome

C. Cytoplasm

D. Golgi apparatus

Answer Explanation:

Only plant cells have cell walls, which help protect the cell and provide structural support.  The cell wall also enforces the overall structural integrity of the plant cell, and it is found outside the cell membrane. The next organelle is a chloroplast. It is found in the cytoplasm of only plant cells. Chloroplasts are photosynthetic compounds used to make food for plant cells by harnessing energy from the sun. These organelles play a role in photosynthesis.

Therefore, the Correct Answer is A.

More Questions on TEAS 7 Science

  • Q #1: Which statement best represents Mendel’s experiments with garden peas?

    A. As a result, Mendel developed several theories that have since been disproved.

    B. Mendel realized he was on an incorrect track, which led him to other experimental media

    C. As a result, Mendel developed foundational conclusions that are still valued and followed today.

    D. Mendel collaborated with others interested in genetics to develop heredity guidelines we still use today

    Answer Explanation

    Mendel developed theories of genetics that scientists around the world use today.

    From experiments with garden peas, Mendel developed a simple set of rules that accurately predicted patterns of heredity. He discovered that plants either self-pollinate or cross-pollinate, when the pollen from one plant fertilizes the pistil of another plant. He also discovered that traits are either dominant or recessive. Dominant traits are expressed, and recessive traits are hidden.

    Mendel’s Theory of Heredity

    To explain his results, Mendel proposed a theory that has become the foundation of the science of genetics. The theory has five elements:

    • Parents do not transmit traits directly to their offspring. Rather, they pass on units of information called genes.
    • For each trait, an individual has two factors: one from each parent. If the two factors have the same information, the individual is homozygous for that trait. If the two factors are different, the individual is heterozygous for that trait. Each copy of a factor, or gene, is called an allele.
    • The alleles determine the physical appearance, or phenotype. The set of alleles an individual has is its genotype.
    • An individual receives one allele from each parent.
    • The presence of an allele does not guarantee that the trait will be expressed.

  • Q #2: What type of reaction is described by the following equation? ZnBr2(aq) + 2KOH(aq) → Zn(OH)2(s) + 2KBr(aq)

    A. Synthesis

    B. Decomposition

    C. Single-Replacement

    D. Double-Replacement

    Answer Explanation

    In this reaction, two elements are trading places hence double-replacement. In the reactants, zinc and bromide ions are together, and potassium and hydroxide ions are together. In the products, zinc and hydroxide ions are together, and potassium and bromide ions are together.

  • Q #3: A person is diagnosed as having acidosis, a condition in which the blood pH is below 7.45. What does the doctor most likely conclude?

    A. Too much carbon dioxide is found in the blood.

    B. Highly oxygenated blood circulates through the body

    C. A blockage prevents blood from leaving the pulmonary artery

    D. The nasal cavity has a difficult time clearing particles from the air.

    Answer Explanation

    Acidosis is when the body fluids contain too much acid, or low pH. The kidneys and lungs are unable to keep the body’s pH in balance. Acidosis is the result when there is too much loss of bicarbonate from the blood known as metabolic acidosis, or due to a buildup of carbon dioxide in the blood due to poor lung function, known as respiratory acidosis. It is the opposite of alkalosis, which is a condition in which there is too much base in the body fluids.

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