NEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4380
What are the difference between plant cell and animal
cell? Answer:
PLANT CELLS
| read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4381What are cis and trnas face of golgi? Answer: The golgi apparatus is usually located near the cell
nucleus. It is composed of a series of layers called golgi stacks. Proteins
from the ER always enter and exit the golgi apparatus from the same l... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4382What are the function of Golgi? Answer: It receive all the secretory material and membrane
synthesized by the endoplasmic reticulum and modifies these products by
glycosylation, but also packages them and sends them in vesicular carriers to
... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4383What are lysosomes? Answer: Lysosomes are organelles that contain digestive enzymes
(acid hydrolases). They digest excess or worn out organelles, food particles,
and engulfed viruses or bacteria. The membrane surrounding a lysosome
prevents ... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4384What are the function of lysosomes? Answer: 1. Phagocytosis
Phagocytosis is the process by which the
cell engulfs particulate matter (>0.5 mm) from the extra cellular space,
and digests it by lysosomal ac... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4385Describe the structure of Mitochondria? Answer: Mitochondria have two membranes (not one as in other
organelles). The outer membrane covers the organelle and contains it. The
inner membrane folds over many times (cristae). That folding increase... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4386What is lipid bilayer in plasma membrane? Answer: The cell membrane consists of a thin layer of amphipathic
lipids which spontaneously arrange so that the hydrophobic "tail"
regions are shielded from the surrounding polar fluid, causi... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4387What is glycocalyx? Answer: The extracellular portions of plasma membrane proteins are
generally glycosylated. Likewise, the carbohydrate portions of glycolipids
are exposed on the outer face of the plasma membrane. Consequently, the
surface... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4388Define cell? Answer: Cell is the structural and functional unit of life.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4389Who first observed living cell? Answer: Anton Von Leeuwenhoek first observed the living cell.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4390Who first coined the word cell? Answer: Robert Hook first coined the word cell.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4391Name the outermost and innermost layers of the cell
envelope in a prokaryotic cell? Answer: The outermost cell is known as cell wall and the inner
most layer is known as plasma membrane.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4392Name the filament that helps in the motility of bacterial
cell? Answer: Flagella helps in the motility of bacterial cell.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4393Name two surface extensions in bacterial cells that do not
help in motility? Answer: Pili and Fimbriae are the two extensions in bacterial
cells that do not help in motility.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4394Name two subunits of ribosomes in prokaryotes? Answer: 70s ribosomes are found in prokaryotes with 50s and 30s
subunits.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4395Name any two groups of organisms where gas vacuole are
present? Answer: Gas vacuoles are present in cyanobacteria and purple and
green photosynthetic bacteria.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4396Name the membrane boundary of vacuole? Answer: The membrane boundary of vacuole is called tonoplast.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4397Why mitochondria is called the powerhouse of the cell? Answer: As the main function of the mitochondria is aerobic
respiration and ATP synthesis so it is called powerhouse of the cell.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4398What are three functions of the plasma membrane? Answer: Uptake of nutrients
Sensing external stimuli
Cellulose synthesis... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4399What forms can plastids take and what function do they
have? Answer: Chloroplasts – Photosynthesis
Amyloplasts – Starch storage
Chromoplasts – Pigmentation... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4400How does secondary wall differ from primary wall? Answer: Secondary wall has a higher proportion of cellulose and
hemicellulose. Secondary wall is often lignified.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4401What are polysomes? What is its function? Answer: When several individual ribosomes become attached to a
single messenger RNA (mRNA) molecule, they form a structure called a
polyribosome, or a polysome. They help in protein synthesis.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4402What is middle lamella and with what it is made up of? Answer: This is the first layer formed during cell division. It
makes up the outer wall of the cell and is shared by adjacent cells. It is
composed of pectic compounds and protein.... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4403What are plasmodesmata? Answer: Microscopic channels of plants facilitating transport and
communication between individual cells. Unlike animal cells, plant cells are protected
by an impermeable cell wall; and as such, plasmodesmata are require... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4404Describe the fluid mosaic model of Plasma membrane? Answer: This model suggests that the membrane is fundamentally a
phospholipid bilayer. The molecules of this bilayer are not bonded to one
another, but float freely in two dimensions. In the t... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4405What are the parts of the nucleus? Answer: The nucleolus is organized from the "nucleolar
organizing regions" on different chromosomes. A number of chromosomes
get together and transcribe ribosomal RNA at this site. The nuclear
org... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4406Describe the structure of flagella in prokaryotes? Answer: Flagella: Bacterial flagella are rigid, hollow
structures constructed of the protein flagellin (FliC). A hook to the basal
body, which serves as the motor, attaches each long filamen... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4407Describe the structure of cilia and flagella in
eukaryotes? Answer: Although cilia and flagella are the same, they were given
different names before their structures were studied. Typically, cells
possess one or two long flagella, whereas ci... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4408Difference between Prokaryotes and Eukaryotes? Answer:
Characteristic
| read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4409Describe the structure of ribosomes? Answer: Ribosomes are the large, ribonucleoprotein FACTORIES in
which proteins are synthesized. Free ribosomes are "free" to move
about anywhere in the cytoplasm (within the cell membrane). Protein... read moreNEET - Grade 11 - Biology - Cell : The Unit of Life - Study ref# 4410What are the types of Plastids? Answer: ETIOPLAST - plastid whose development into a
chloroplast has been arrested (stopped) by lack of LIGHT. They contain dark
crystalline bodies, called prolamellar body, which is essentially a cluster
of t... read more
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