CBSE Class 11 Biology MCQs Set A

Answer : C

Question. The pushing out of materials by the cell against the concentration gradient is:
(a) Low transport  
(b) Passive transport  
(c) Active transport  
(d) Moderate transport

Answer : C

Question. Robert Hooke examined thin slices of cork made up of the bark of:
(a) Pine  
(b) Sheesham 
(c) Oak  
(d) Mulberry

Answer : C

Question. In thin slices of cork Robert Hooke noticed.
(a) Tiny creatures  
(b) Small holes  
(c) Small chambers 
(d) Bacteria

Answer : C

Question. Henri Dutrochet confirmed.
(a) Robert Brown observations on Nucleus 
(b) Robert Hooke’s observations on Cells
(c) Schwann observations of cells  
(d) Schleiden observations on cells

Answer : B

Question. They provide support to the plant body:
(a) Phloem cells 
(b) Parenchyma cells  
(c) Sclerenchyma cells 
(d) Chlorechyma cells

Answer : C

Question. Parenchyma cells are concerned with:
(a) Secretion  
(b) Support  
(c) Carry Oxygen  
(d) Storage of surplus food

Answer : D

Question. Substances cross the cell membrane more easily when they are:
(a) Water soluble 
(b) Protein soluble  
(c) Alcohol soluble  
(d) Lipid soluble

Answer : D

Question. Many substances that are not needed constantly enter the cell by:
(a) Passive transport  
(b) Active transport
 (c) Negative transport 
(d) Fast transport

Answer : B

Question. It is a true cell wall in a newly growing cell:
(a) Middle lamella 
(b) Secondary wall 
(c) Primary wall 
(d) Plasma membrane

Answer : C

Question. It is the first to be formed:
(a) Primary wall  
(b) Secondary wall  
(c) Tertiary wall  
(d) Middle lamella

Answer : A

Question. It is a site of certain metabolic pathways:
(a) Cell wall   
(b) Plasma membrane  
(c) Cytoplasm 
(d) A & B

Answer : C

Question. The water percentage of cytosol in the cytoplasm is:
(a) 50  
(b) 60   
(c) 70  
(d) 90

Answer : D

Question. New Ribosomes are assembled in the :
(a) Nucleolus  
(b) Mitochondria  
(c) Endoplasmic Reticulum  
(d) Golgi Apparatus

Answer : A

Question. Smooth Endoplasmic Reticulum helps to:
(a) Synthesize proteins  
(b) Detoxify the harmful drugs
(c) Prepare food  
(d) Decompose proteins

Answer : B

Question. Morphologically Endoplasmic Reticulum exists in:
(a) Four forms 
(b) Three forms  
(c) Two forms  
(d) One form

Answer : B

Question. The 60S and 40S subunits on attachment with each other form:
(a) 100S particle  
(b) 90S particle  
(c) 80S particle  
(d) 70S particle

Answer : C

Question. Proteins are synthesized in the:
(a) Ribosomes  
(b) Mitochondria 
(c) Nucleus 
(d) Nucleolus

Answer : A

Question. They are absent in higher plants:
(a) Plastids  
(b) Golgi Apparatus 
(c) Cell Membranes  
(d) Centrioles

Answer : D

Question. Amino acids (proteins) are present in the cell walls of:
(a) Gymnosperms  
(b) Bacteria  
(c) Mosses 
(d) Angiosperms

Answer : B

Question. Which of the following organelles is present in both prokaryotic and eukaryotic cells?
(a) Chloroplast
(b) Ribosomes
(c) Mitochondria
(d) Golgi Complex

Answer : B

Question. Which of the following features is not shared by prokaryotic and eukaryotic cells?
(a) Ribosome
(b) Cytoplasm
(c) Cell membrane
(d) Nuclear membrane

Answer : D

Question. Which of the following cell organelles is present in both plant and animal cells?
(a) Chlorophyll
(b) Plasma membrane
(c) Plastids
(d) Cell wall

Answer : B

Question. Which of the following pair is incorrect?
(a) Ribosome ______________Protein synthesis
(b) Chloroplast _____________Photosynthesis
(c) Mitochondria ____________Fermentation
(d) Plasma membrane___________Osmosis

Answer : C

Question. Which of the structures is not found in a prokaryotic cell?
(a) Plasma membrane
(b) Nuclear envelope
(c) Ribosome
(d) Cell wall

Answer : B

Question. How may membranes comprise the nuclear envelop?
(a) None
(b) One
(c) Two
(d) Three

Answer : C

Question. Which of the following molecules move regularly from the nucleus to the cytoplasm?
(a) Glycogen
(b) DNA
(c) RNA
(d) Cholesterol

Answer : C

Question. Which of the following cellular organelles extracts energy from glucose and forms ATP molecules:
(a) Lysosome
(b) Chloroplast
(c) Mitochondrion
(d) Chromoplast

Answer : C

Question. Lysosomes contain enzymes capable of:
(a) Aerobic cellular respiration
(b) Digesting part of the cell
(c) Synthesizing protein
(d) Synthesizing lipids

Answer : B

Question. Mitochondria are found:
(a) in all cells
(b) only in plant cells
(c) only in animal cells
(d) in all eukaryotic cells

Answer : D

Question. Green pigments capable of capturing the energy of sunlight are located within the:
(a) Golgi complex
(b) Endoplasmic complex
(c) Chloroplast
(d) Cell wall

Answer : C

Question. The two types of cellular organelles that transform energy are:
(a) Chromoplasts and leucoplast
(b) Mitochondria and chloroplast
(c) Mitochondria and Chromoplasts
(d) Chloroplasts and leucoplasts

Answer : B

Question. The plastids that give fruits and flowers their orange and yellow colours are the:
(a) leucoplasts
(b) chloroplasts
(c) Chromoplasts
(d) Proplasts

Answer : C

Question. The main function of the plasma membrane is to:
(a) synthesize ribosomes
(b) Control what goes into and out of the cell
(c) Allow all kinds of substances to enter the cell
(d) Move the cell from place to place

Answer : B

Question. Plant cells are connected by channels through their walls called:
(a) Plasmodesmata
(b) desmosomes
(c) middle lamella
(d) non of these

Answer : A

Question. In the fluid mosaic membrane model the lipid bilayer
(a) is sandwiched between two protein layers
(b) has protein embedded in it
(c) lies on top of a single protein layer
(d) is covered by a single protein layer

Answer : B

Question. An input of energy is required for which one of the following?
(a) diffusion
(b) osmosis
(c) passive transport
(d) active transport

Answer : D

Question. Which of the following cytoplamic organelles is not bounded by membrane:
(a) Mitochodrion
(b) Lysosome
(c) Ribosome
(d) Plastids

Answer : C

Question. Which of the following bodies is not bounded by a double membrane structure?
(a) mitochondrion
(b) chloroplast
(c) Lysosome
(d) Nucleus

Answer : C

Question. Which of the following cell organelles cause a decrease in the concentration of organic material in the cell?
(a) Golgi bodies
(b) Chloroplast
(c) Ribosome
(d) Mitochondrion

Answer : D

Question. Which of the following cell organelles is not involved in the sequence of events from synthesis of an enzyme to its excretion?
(a) Ribosome
(b) Lysosome
(c) Golgi apparatus
(d) Endoplasmic reticulum

Answer : B

Question. A lipid molecule in the plasma membrane has a head and two tails. The tails are found:
(a) At the surfaces of the membrane
(b) In the interior of the membrane
(c) Both at the surfaces and interior of the membrane
(d) None of these

Answer : B

Question. Which of the following organelles and their contents are incorrectly paired:
(a) Ribosome – RNA
(b) Mitochondrion – Chlorophyll
(c) Lysosome – digestive enzymes
(d) Nucleus – DNA

Answer : B

Question. Which of the following properties is incorrect for both mitochondria and chloroplast:
(a) Both have an electron transport system
(b) ATP synthesis
(c) Both are present in all cells
(d) Both are double membrane structures

Answer : C

Question. Which of the following cell organelles release oxygen:
(a) ribosome
(b) Golgi complex
(c) Mitochondria
(d) Chloroplast

Answer : D

Question. Active transport:
(a) requires a protein carrier
(b) moves a molecule against its concentration gradient
(c) requires a supply of energy
(d) all of these

Answer : D

Question. The nucleolus is largely composed of rRNA and
(a) lipid
(b) Glucose
(c) Wax
(d) Protein

Answer : D