VincenTragosta - Tanya, Jawab, dan Belajar Tanpa Batas Logo

Questions in biology

[Terjawab] Restriction enzymes: A. Weld together fragments of DNA. B. Attach to DNA molecules at specific sites and cut both strands of DNA at that place. C. Only cut RNA molecules at specific sites and cut both strands of DNA at that place. D. Are chemical machines that make parts of the cell membrane.

[Terjawab] What are the products of the replication of one DNA molecule? Select one: A. Two strands joined into one double-stranded DNA molecule B. Two identical double-stranded DNA molecules C. A set of four sister chromatids D. A pair of homologous chromosomes E. Four identical double-stranded DNA molecules

[Terjawab] Fill in the blanks of the following sentences. A chromosome contains one long __________ molecule. Each gene in this molecule gives the instructions for making a __________________. Both chromosomes in a pair of ______________________ chromosomes have the same ___________, but the two chromosomes may have different _________________. Chromosomes that are not homologous have different ______________ which give the instructions for making different kinds of proteins.

[Terjawab] Write a caption to describe how the butterfly's long mouthpart helps it survive.

[Terjawab] A scientist finds a new life form and determines that it performs photosynthesis. Which of the six kingdoms could it belong to? Select the list that contains all the possible kingdoms. A. Protista, Fungi, and Plantae B. Eubacteria, Archaebacteria, Fungi, and Plantae C. Eubacteria, Archaebacteria, Protista, and Plantae D. Protista and Plantae

[Terjawab] For biological evolution to occur by way of natural selection, the trait being selected for need NOT: A. be heritable B. vary among individuals C. increase an individual's lifespan D. increase an individual's reproductive success

[Terjawab] Explain how the use of chemicals designed to kill grasshoppers could reduce the population of peregrine falcons.

[Terjawab] When an athlete is nearing the end of a race and her cells are low on oxygen, which of the following is likely to occur in her cells so that glycolysis can continue to produce ATP? A. Protein synthesis B. DNA synthesis C. Fermentation D. Cell-to-cell communication

[Terjawab] A tall plant (TT) is crossed with a short plant (tt). If the tall F1 pea plants are allowed to self-pollinate, what will the offspring be? A. The offspring will be of medium height. B. All of the offspring will be tall. C. All of the offspring will be short. D. The offspring can be tall or short.

[Terjawab] Which statement best describes the function of veins, arteries, and capillaries in the circulatory system? A. Veins transfer oxygen-depleted blood away from the heart; arteries transfer oxygen-rich blood to the heart; capillaries provide blood to individual cells. B. Veins provide blood to individual cells; capillaries transfer oxygen-depleted blood away from the heart; arteries transfer oxygen-rich blood to the heart. C. Veins transfer oxygen-depleted blood away from the heart; capillaries transfer oxygen-rich blood to the heart; arteries provide blood to individual cells.