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! 

Which of the following substances is unable to diffuse across the plasma membrane?
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 correctly places the stages of mitosis in order?
Fill in the blanks: Proteins are made of different ____________ which are arranged in different orders, or _________________.
Which of the following statements is true regarding anabolism?
Why is DNA important?
Which of the following is true of diffusion?
What type of microscope would be most effective for studying a living cell?
Which of the following correctly describes the structure and function of the cell wall in plants?
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?
What is true of a competitive inhibitor?
The flower of a plant is involved in reproduction. Which parts are male and which are female?
Which component of a nucleotide contains the information needed to make proteins?
Which of the following choices describes a function of the plasma membrane? Choose all answers that apply.
Which of the following is an example of active transport?
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?
A mutation occurs in the chloroplasts of a lettuce plant, causing its thylakoid membranes to become more permeable to charged ions. How might this mutation affect the Calvin cycle?
How is ATP hydrolysis used to power other cellular reactions?
The fossil of Archaeopteryx represents the evidence of origin of:
Some substances such as sugars, amino acids, and ions move across the cell membrane from an area of high concentration to an area of low concentration using special proteins embedded in the membrane. Which of the following terms applies to this type of cell transport?
Amoeba proteus is a species of amoeba that gets its energy by engulfing small, unicellular organisms with its membrane. It then digests these organisms using internal vesicles. What is the name of the process used by Amoeba proteus to get its energy?
Which of the following are roles of amino acids at an enzyme's active site?
Which of the following statements is true regarding the energy source used in primary vs. secondary active transport?
Which of the following is true regarding carrier protein transport?
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?
Starch turns a blue-black color in the presence of iodine. Julian decides to use this information to test the permeability of some dialysis tubing. He fills the tubing with a starch solution and places it in a beaker of iodine and water. After two hours, the starch solution in the dialysis tubing turns blue-black. The iodine solution remains the same color (it doesn't change colors). What do Julian's results show about the permeability of the tubing?
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?
Which of the following statements best describes eukaryote chromosomes compared to prokaryote chromosomes?
How can substances be transported across a membrane against their concentration gradient?
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?
Organisms in temperate zones are able to time their activities to cues given by the photoperiod, since:
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?
Some snakes, like boa constrictors, have small non-functional leg bones near their tail ends. What term best describes the leg bones found in these snakes?
Which of the following are components of adenosine triphospate (ATP)?
Which symbiotic relationship is described by one individual benefiting and the other being neither harmed nor benefited?
Which of the following describes the function of the sodium-potassium pump?
What is the primary function of cofactors?
A pigeon zygote contains 80 chromosomes. How many chromosomes did the zygote receive from its mother?
Which of the following is an example of a homozygous dominant genotype?
Which of the following correctly describes meiosis?
Ptyalin is an enzyme produced in the:
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?
Emma believes viruses are not living organisms while Kayla believes viruses are living organisms. Who is correct and why?
Even though humans are approximately 99.9 % 99.9%99, point, 9, percent identical in their genetic makeup, an incredible amount of variation is seen among individuals of the species. This genetic variation is greatly influenced by the process of meiosis. Of the following events that occur during meiosis, which contributes most to genetic diversity in the human population?
Several genes are responsible for preventing cells from dividing when conditions are not right. Two examples are tumor suppressor genes and proto-oncogenes. Which of the following accurately compares tumor suppressor genes and proto-oncogenes?
Which statement is true of enzymes?
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?
What is the relationship between anabolic and catabolic pathways?
A student is examining a whitefish blastula cell under a microscope. Based on his observations, the student proposes that the whitefish blastula cell is in interphase. Which of the following pieces of evidence would best support the student’s claim?
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?