Concept explainers
A cell may allow a large or charged chemical to move across the cytoplasmic membrane, down the chemical’s electrical and chemical gradients, in a process called ______________________.
- a. active transport
- b. facilitated diffusion
- c. endocytosis
- d. pinocytosis
Introduction:
The basic unit of life is cell. It forms the basis for function, biological and structural unit of all living organisms. Cell biology is a branch of biology that deals with the study of the cells. Schleiden, Virchow, and Schwann’s work helped in creating cell theory which states that all organisms are composed of cells that are the basic unit of life.
Answer to Problem 1MC
Correct answer:
A cell may allow charged or large chemicals to move across the membrane, down the chemical’s electric and chemical gradient, in a process called facilitated diffusion.
Therefore, option (b) is correct.
Option (b) is given as “facilitated diffusion”.
Explanation of Solution
Justify reason for the correct statement:
Facilitated diffusion is the movement of large or charged chemical down a concentration gradient across the cytoplasmic membrane, without energy from ATP.
Hence, option (b) is correct.
Justify reasons for the incorrect statements:
Option (a) is given as “active transport”.
When molecules pass through the membrane against concentration gradient by the process of simple diffusion using ATP as energy, that process is known as active transport. The net movement of the molecule is from lower concentration to the higher concentration. Hence, it is a wrong answer.
Option (c) is given as “endocytosis”.
In endocytosis the molecules that are too large to be conveyed across the membrane of the cell are transported in the form of vesicles originate by the budding of the cell membrane. Hence, it is a wrong answer.
Option (d) is given as “pinocytosis”.
It is the process by which ingestion of liquid takes place by cell through budding from the cell membrane. Hence, it is a wrong answer.
Hence, options (a), (c), and (d) are incorrect.
Facilitated diffusion allow large or charged chemical to move across the membrane down the chemical gradient.
Want to see more full solutions like this?
Chapter 3 Solutions
Microbiology with Diseases by Taxonomy (5th Edition)
- _________2. Which is not an application of recombinant DNA technology in medicine? a. Growth Hormone b. Insulin c. golden rich d. Blood clotting factor VIIIarrow_forward_______________________ is the molecule within a cell that actually assembles proteins from amino acids. a. An enzyme b. The nucleus c. RNA d. ALH84001 e. PAHarrow_forwardWhich of the following imaging techniques would be best to use to study the uptake of nutrients by rapidly multiplying cancer cells? a. CT b. MRI c. PET d. ultrasonographyarrow_forward
- Select the correct answer from the answers provided. To digest cellulose in its environment, a fungus produces a/an a. endoenzyme c. catalase b. exoenzyme d. polymerasearrow_forward______________ function in the collection, packaging, and distribution of molecules made in the cell. a. mitochondria b. ribosomes c. golgi bodies d. peroxisomesarrow_forwardWhich one of the following diagnostic imaging technique produce two-dimensional images using radon transforms of multiple x-ray scans? Select one: a. Fluorescence imaging b. Computerized tomography c. Ultrasound imaging d. Magnetic resonance imagingarrow_forward
- Alcohol addiction carries a strong genetic component? A. True B. Falsearrow_forwardThe U.S has no labeling requirements for products containing genetically modified organisms (GMOs)? A. True B. Falsearrow_forward38. _______________ is non-selective type of endocytosis, transporting substances into the cell. a. phagocytosis b. pinocytosis c. receptor-mediated endocytosis d. a and b e. a and carrow_forward
- Ribosomes are often the target of antibiotics used to control bacterial infections. Despite also containing ribosomes, eukaryotic cells are unaffected by antibiotics because of _____________________ A. Eukaryotic cells' ability to avoid uptake of antibiotics B. Structural differences between eukaryotic and prokaryotic ribosomes C. The nuclear envelope that protects the ribosomes from antibiotics D. Functional differences between eukaryotic and prokaryotic ribosomesarrow_forwardWhen is the best time to request help with an assigned paper? a. At least two weeks before it is due. b. Within 24 hours of the due date and time. c. When you finish writing the final draft. d. After completing and reviewing the rough draft.arrow_forwardFree radicals are very stable, which is why they accumulate in our body to cause aging? A. True B. Falsearrow_forward
- Essentials Health Info Management Principles/Prac...Health & NutritionISBN:9780357191651Author:BowiePublisher:CengageUnderstanding Health Insurance: A Guide to Billin...Health & NutritionISBN:9781337679480Author:GREENPublisher:Cengage
- Medical Terminology for Health Professions, Spira...Health & NutritionISBN:9781305634350Author:Ann Ehrlich, Carol L. Schroeder, Laura Ehrlich, Katrina A. SchroederPublisher:Cengage Learning