Biology (DOST JLSS Reviewer)

This Biology Practice Test is comprised of 50 random questions from General Biology. It is comprised of questions from topics such as Cell/Cell Cycle/Cell Transport System; Energy Transformation; Organismal Biology; Genetics; and Evolution. Please read the questions carefully and choose the correct answer from the choices below. The correct answer will be marked green; otherwise, it will be marked red. Good luck! 

The following table indicates the presence or absence of selected traits for a set of animal species. The data about which trait provides the strongest evidence that all of the animal species in the table share a common ancestor?
A pigeon zygote contains 80 chromosomes. How many chromosomes did the zygote receive from its mother?
Which of the following molecules crosses through a semipermeable membrane during the process of osmosis?
Which of the following statements is true regarding the energy source used in primary vs. secondary active transport?
The living material comprising the bulk of a cell is called the:
A genetic mutation causes a snake to have brown skin. After many generations, most of the snake population has the brown skin mutation. Which of the following most likely caused this change?
Pepstatin binds to the enzyme pepsin. The substrate is still able to bind to the active site, but the reaction is blocked. What is this an example of?
During the cell-mediated immune response, killer T-cells target and kill infected cells. This process is shown in the image below. During an experiment, researchers introduced a substance that caused the Class I MHC molecule to break down. Which of the following best describes how the cell-mediated immune response will be affected?
Tahira placed a collection of red blood cells into a container filled with an unknown solution. Once in the container, Tahira noticed that the red blood cells swelled and some of them burst. What type of solution were the red blood cells placed in?
Which answer choice best describes the hind leg bones seen in the modern-day whale?
The following is an excerpt from a scientific paper written by Levy et al.
The plant cell wall is a barrier to virus exit from and entry into cells. Thus, successful infection requires that plant viruses encode movement proteins to transport the viral genome locally cell-to-cell within a leaf and on into the vascular system, through which the virus will systematically invade the plant.
Which of the following best predicts how movement proteins help plant viruses travel from one plant cell to another?
Which of the following are roles of amino acids at an enzyme's active site?
What is true of a competitive inhibitor?
A group of students are studying flower color inheritance in the garden pea plant (Pisum sativum). They obtain a purple-flowered pea plant of unknown ancestry, allow it to self-pollinate, and collect 60 6060 of its seeds. After planting the seeds, they observe the growth of 42 4242 purple-flowered plants and 18 1818 white-flowered plants.
Which of the following best explains the flower colors seen in the offspring?
What is meant by the term "genetic variation?"
During cell communication in the nervous system, chemical messengers called neurotransmitters travel between neurons. As they travel, neurotransmitters send messages from one neuron to another. Which of the following best describes the role of neurotransmitters in neuron-to-neuron communication?
The flower of a plant is involved in reproduction. Which parts are male and which are female?
Which of the following is true regarding the proteins involved in facilitated diffusion?
Fill in the blanks: Proteins are made of different ____________ which are arranged in different orders, or _________________.
A scientist hydrolyzes ATP in a laboratory test tube. He finds that about 3 times as much heat is released than when the same amount of ATP is hydrolyzed in a cell. What best explains the scientist's observation?
Ptyalin is an enzyme produced in the:
Which of the following describes the function of the sodium-potassium pump?
Which correctly places the stages of mitosis in order?
How does an enzyme affect the rate of a reaction?
Which of the following is an example of active transport?
Which statement is true of enzymes?
Which of the following correctly describes meiosis?
A gray wolf's sperm contains 39 chromosomes. He mates with a female gray wolf. How many chromosomes will there be in the resulting zygote?
The data above represent the results of three different crosses in which a single gene determines whether a certain organism is blue or yellow.
Which of the following best describes how this gene is inherited from parents to offspring?
The existence of microorganisms in the human gastric system is an example of:
The U shaped pipe shown in the figure below is divided with a membrane that is only permeable to water. Which of the following best describes how water will flow through the membrane?
What level does the mice primarily eat in?
A scientist views a unicellular organism called a euglena under a microscope. Based on the diagram, what type of organism is the euglena and why?
How is ATP hydrolysis used to power other cellular reactions?
What organelle is the site of photosynthesis in plants?
The Calvin cycle is considered light-independent because it can occur in darkness. However, most often the Calvin cycle takes place in sunlight. Which of the following likely explains why?
The enzyme ptyalin helps digest carbohydrates, while the enzyme pepsin helps digest proteins. What prevents ptyalin and pepsin from digesting the same type of food?
Which of the following is true regarding the cell theory?
Emma believes viruses are not living organisms while Kayla believes viruses are living organisms. Who is correct and why?
Which of the following is true regarding receptor-mediated endocytosis (RME)?
Which of the following best explains how an individual's evolutionary fitness is measured?
Which of the following correctly describes how mitosis and meiosis are different?
The graph below shows a metabolic pathway. Which of the following does the graph most likely represent?
The human body has 23 homologous pairs of chromosomes. How many chromosomes does a somatic cell have?
What type of microscope would be most effective for studying a living cell?
Which of the following statements is true regarding anabolism?
What is the main function of cytoplasm in a cell?
Which of the following molecules is used as "energy currency" for the cell?
In animals, sexual reproduction depends on the production of gametes. Which of the following processes produces gametes in animals?
Photosynthesis can be divided into two steps: the light-dependent reactions and the Calvin cycle. Which of the following is true regarding these two steps?