Concept explainers
Which of the following cellular structures is not easily visible with the compound light microscope?
- nucleus
- DNA
- cytoplasm
- plasma membrane
Introduction:
The biological microscope uses light to observe the cellular structures that are not visible by the naked eyes. It consists of two lenses: the eyepiece and the objective lens to form the image. The microscope uses visible light for the illumination of the object, and then the image is magnified by the lenses. The resolving power is 0.2µm and 1500x is the highest magnification of the light microscope.
Answer to Problem 1PL
Correct answer:
The correct answer is option (b) DNA.
Explanation of Solution
Explanation/justification for the correct answer:
Option (b) DNA. An electron microscope is used to observe the DNA molecule, which has a resolution of 0.2 nm, which makes it easier to observe the smaller units. In contrast, the typical light microscope is limited to the resolution of only 0.2 µm. Hence, it is not easy to observe the DNA molecule. So, the correct answer is option (b).
Explanation for incorrect answer:
Option (a) nucleus. The nucleus is the controller of the cell and is the darkly stained body that can be easily visible under a light microscope. So, this is an incorrect option.
Option (c) cytoplasm. The cytoplasm is observed under the light microscope, which is the part of the cell consisting of all the cell organelles. The cytoplasm can be easily identified in a stained cell. So, this is an incorrect option.
Option (d) plasma membrane. The plasma membrane is the covering of the cell that encloses all the living components of the cell. The membrane can be visualized by staining the cell. So, this is an incorrect option.
Want to see more full solutions like this?
Chapter 5 Solutions
Laboratory Manual for Human Anatomy & Physiology Main Version
- Cell membranes consist mainly of a _________. a. carbohydrate bilayer and proteins b. protein bilayer and phospholipids c. phospholipid bilayer and proteinsarrow_forwardFigure 4.7 Prokaryotic cells are much smaller than eukaryotic cells. What advantages might small cell size confer on a cell? What advantages might large cell size have?arrow_forwardCytoskeleton is important for the proper function of cell and one of its components is : microtubles plastids ribosomes cytoplasm chromosomesarrow_forward
- Which of the following organelles organizes the movement of chromosomes during mitosis? Peroxisome Lysosome Endoplasmic reticulum Centriolearrow_forwardWhich of the following organelles most closely resembles a prokaryotic cell? cell wall mitochondrion nucleus vacuole O Golgi complexarrow_forwardLabel and define the following termsarrow_forward
- Which of the following is a feature of prokaryotic cells but not eukaryotic cells? DNA flagella pili cell wallarrow_forwardWhich of the following structures would never be found in a eukaryotic cell? Cell wall Cell membrane Nucleoid region Nucleolus Nucleusarrow_forwardWhich of the following statements is true about the Nucleus cell organelles? Nucleus is not present in prokaryotes. The chief components of the O nucleus are Chromatin and Nucleolus. It contains DNA and other genetic materials. O All of the abovearrow_forward
- Which of the following eukaryotic organelles contains 3 membranes (with 1 opaque to light)? the mitochondrion the peroxisome the chloroplast the lysosome the nucleusarrow_forwardWhich of these organelles is directly involved in the motility of cells, either by moving substances past a cell which is fixed in place, or moving the cell itself within a liquid environment? Mark all that apply. Group of answer choices cilia flagella free ribosomes Golgi complex (Golgi apparatus) lysosomes mitochondria peroxisomes proteasomes rough endoplasmic reticulum smooth endoplasmic reticulum spliceosomesarrow_forwardWhich of the following is not true for eukaryotic cells? None of these Cell wall contains peptidoglycan as one of the major components Chromosome contain histone Nucleus is bounded by nuclear membranearrow_forward
- Biology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxHuman Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning