2 CELL BIOLOGY ( UHS )

Q.1 When chromosomes uncoil, the nucleoli are reformed and two nuclei are the two poles of the
cell; stage is known as

Q.2 Mental retardation, short stature, broad face and squint eyes are the symptoms of

Q.3 Chiasmata formation takes place during the process which is known as

Q.4 Healing of a wound and repair is the phenomenon which takes place by the process of

Q.5 Which one of the following is the main cause of cancer?

Q.6 Which of the following organelles is concerned with the cell secretion

Q.7 Which of the following contains peptidoglycan cell wall?

Q.8 The inner membrane of mitochondria is folded to form finger like structure called

Q.9 Interior of chloroplast is divided into heterogeneous structure, embedded in the matrix known as

Q.10 In which phase of the cell division the metabolic activity of the nucleus is high?

Q.11 Plastids are only found in the

Q.12 Plasma membrane is chemically composed of

Q.13 Endoplasmic reticulum contains a system of flattened membrane-bounded sacs which are

Q.14 Lipids synthesis / metabolism takes place in which of the following organelle?

Q.15 Ribosomes exist in two forms, either attached with RER or freely dispersed in the

Q.16 Exchange of segments between homologous chromosomes is called

Q.17 If a person has 44 autosomes + XXY, he will suffer from

Q.18 The ribosomal RNA is synthesized and stored in

Q.19 In which stage of Interphase, there is increase in cell size and many biochemical are formed?

Q.20 In Down’s syndrome, which one of the following pair of chromosome fails to segregate?

Q.21 The process by which unwanted structures within the cell are engulfed and digested within the
lysosome is known as:

Q.22 The _______ model of plasma membrane suggests that proteins are embedded in lipid bilayer:

Q.24 Lipid metabolism is the function of:

Q.25 The enzymes of lysosomes are synthesized on:

Q.26 Centrioles are made up of ______ microtubules:

Q.27 Which of the following structures is absent in higher plants and found in animal cells:

Q.28 The soluble part of cytoplasm or fluid that remains when all organelles are removed is known
as:

Q.29 The outer membrane of the nuclear envelope is at places continuous with the:

Q.30 Down’s syndrome is a result of non-disjunction of______ pair of chromosomes that fails to
segregate:

Q.31 During animal cell division, the spindle fibres are formed from

Q.32 Which component of the cell is concerned with cell secretions?

Q.33 During which period of interphase (cell cycle) DNA is synthesized?

Q.34 Peptidoglycan or murein is a special or distinctive feature of cell wall in

Q.35 In mitochondria, small knob-like structures called F1 particles are found in:

Q.36 The most critical phase of mitosis which ensures equal distribution of chromatids in the
daughter cells i

Q.37 Non-disjunction of 21st pair of chromosomes in one of the gamete leads to 47 chromosomes in
one individual. This condition is called

Q.38 The intake of liquid materials across the cell membrane is

Q.39 Which one of the following is the site of oxidative phosphorylation in mitochondria?

Q.40 Organelle involved in the synthesis of ATP is

Q.41 During maternal mitosis, non-disjunction of autosomal chromosome pair results in the
formation of an egg having 24 chromosomes in:

Q.42 Typical symptoms like enlarged breasts and small testis in male are attributed to:

Q.43 Fluid mosaic model of plasma membrane states that protein molecules float in a fluid _____
layer

Q.44 How many triplets of microtubules are present in centriole?

Q.45 Turner’s syndrome is characterized by having:

Q.46 Which one of the following cell structure is involved in the synthesis of lipids?

Q.47 Ribosomes are tiny organisms, which are involved in the synthesis of:

Q.48 Which organelle is bounded by two membranes?

Q.49 At the beginning of nuclear division, the number of microtubule triplets in two pairs of
centrioles that migrate to opposite poles are:

Q.50 The disease in which an individual has extra sex chromosome (44 + XXY) is known as:

Q.51 The rapid exchange of materials through carrier proteins across the plasma membrane is called:

Q.52 The inner membrane of mitochondria form extensive infoldings called:

Q.53 Which one of the following organelle is found in both prokaryotic and eukaryotic cells?

Q.54 Out of the given options, choose the one which shows the structures found only in plants

Q.55 Presence of large central vacuole is the characteristic of:

Q.56 The basic structure of plasma membrane is provided by:

Q.57 The organelle involved in detoxification of drugs and poisons in the liver cells is:

Q.58 Down’s syndrome is characterized by _____________ at chromosome 21.

Q.59 Which of the following is an example of autosomal non-disjunction?

Q.60 Infertility, short height, webbed neck and low hairline at lack are symptoms of _____________