Biology Chapter 4 Entry test MCQs
Topic 4
Introduction to Cell
1. Cell theory is not applicable to:
a. Algae
b. Fungi
c. Virus
d. Bacteria
2. What would be the resolving power of the objective length in a microscope, if the eyepiece is of 10X and total magnification is 40X?
a. 40X
b. 4X
c. 400X
d. 10X
3. The human naked eye can differentiate between two points which are how much apart?
a. 2 dm
b. 1 mm
c. 1 dm
d. 0.1 mm
4. What is the correct sequence of steps in cell fractionation?
a. Centrifugation, homogenization, separation
b. Homogenization, centrifugation, separation
c. Homogenization, separation, centrifugation
d. Separation, homogenization, centrifugation
Compare the Structure of Typical Plant and Animal Cell
5. Plant cells are distinguishable from animal cells in containing:
a. Ribosomes
b. Mitochondria
c. Cell wall
d. Endoplasmic reticulum
7. Out of the given options, choose the one which shows the structures found only in plants?
a. Chloroplast, microtubules, peroxisomes
b. Vacuole, chloroplast, ribosomes
c. Chloroplast, cell wall, mitochondria
d. Chloroplast, cell wall, large vacuole
Cell Wall
9. The layers of cellulosic fibers in cell wall are arranged with each other at:
a. Right angle
b. Obtuse angle
c. Horizontal angle
d. Parallel angle
10. Which of the following is related to prokaryotic cell wall?
a. Murein
b. Sacculus
c. Peptidoglycan
d. All A, B, C
11. It is absent in secondary cell wall:
a. Waxes
b. Silica
c. Cutin
d. Pectin
12. In which type of cells, cell wall is not present:
a. Fungal cells
b. Plant cells
c. Liver cells
d. Bacterial cells
13. Cellulose is usually not found in:
a. Middie lamella
b. Primary cell wall
c. All contain cellulose
d. Secondary cell wall
14. Holding neighboring cells together is function of:
a. Middle lamella
b. Primary cell wall
c. None of these
d. Secondary cell wall
15. All of following are common molecules in membrane of all type of cells except:
a. Cholesterol
b. Globular protein
c. Phospholipid
d. Traces of carbohydrates
16. Hydrophobic portion of plasma membrane is present in/at:
a. Towards cytoplasm
b. Towards extracellular matrix
c. Towards the cytoskeleton
d. Inner core of plasma membrane
17. Which of the following describes the fluid mosaic model of plasma membrane structure?
a. Triglyceride bilayer with embedded proteins
b. Phospholipid monolayer with embedded proteins
c. Triglyceride monolayer with embedded proteins
d. Phospholipid bilayer with embedded proteins
18. In plasma membrane, carbohydrates combine with the lipids and proteins to form glycolipids and glycoproteins and are oriented:
a. Towards outside
b. Towards inside
c. Randomly distributed
d. Towards inside and outside
19. Which of the following is not a characteristic feature of animal cell membrane?
a. Maintain cellular homeostasis
b. Provides mechanical shape
c. Prevent from osmotic lysis
d. Regulate passage of molecules
20. Which of the following acts as receptor site on plasma membrane?
a. Cholesterol molecules
b. Head of phospholipid molecules
c. Glycoprotein
d. Tail of phospholipid molecules
21. Which structure is the most important for cellular life?
a. Chromosome
b. Nucleus
c. Mitochondria
d. Cell membrane
22. The intake of liquid materials across the cell membrane is:
a. Endocytosis
b. Phagocytosis
c. Exocytosis
d. Pinocytosis
23. Which substance from the following is important for the mechanical stability of cell membranes, as without it membranes quickly break and cells burst open? Th hydrophobic region of this molecules help to prevent fon or polar molecules from passing through the cell membrane?
a. Glycolipids
b. Protein
c. Cholesterol
d. Phospholipids
24. Fluid mosaic model of plasma membrane states that protein molecules float in a fluid like layer.
a. Phospholipid
b. Galactose
c. Carbohydrate
d. Glucose
25. The rapid exchange of materials through carrier proteins across the plasma membrane is called:
a. Active Transport
b. Passive Diffusion
c. Facilitated diffusion
d. Endocytosis