NEET UG Botany MCQ-97

Question No:1

Chromosomes in a bacterial cell can be 1-3 in number and :

(A) Are always linear
(B) Can be either circular or linear , but never both within the same cell
(C) Can be circular as well as linear within the same cell
(D) Are always circular

Question No:2

In fluid mosaic model of plasma membrane

(A) Upper layer is non-polar and hydrophilic
(B) Polar layer is hydrophobic
(C) Phospholipids form a bimolecular layer
(D) Protein form a middle layer

Question No:3

Ribosomes are produced in

(A) Nucleus
(B) cytoplasm
(C) Mitochondria
(D) Golgibody

Question No:4

Which of the following exists as more than one but less than five in number in a chromosome

(A) Chromatid
(B) Chromomere
(C) Centromere
(D) Telomere

Question No:5

Extra nuclear chromosomes occur in

(A) Peroxisome, ribosome
(B) Chloroplast and mitochondria
(C) Mitochondria and ribosome
(D) Chloroplast and lysosome

Question No:6

Microtubules are absent in

(A) Mitochondria
(B) Flagella
(C) Spindle fibers
(D) Centriole

Question No:7

Lysomes are the reservoires of

(A) Hydrolytic enzymes
(B) Secretory enzymes
(C) RNA and proteins
(D) Fats (or sugar or ATP)

Question No:8

The cell organelle involved in the glycosylation of proteins is

(A) Ribosomes
(B) Peroxisomes
(C) Mitochondria
(D) Endoplasmic reticulum

Question No:9

In an animal cell, protein synthesis takes place

(A) On the ribosomes present in the cytosol
(B) On the ribosomes attached to nuclear envelop and endoplasmic reticulum
(C) On ribosomes present in the nucleolus as well as in cytoplasm
(D) On ribosomes present in the cytosol as well as in the mitochondria.

Question No:10

Extra nuclear DNA are located in

(A) Lysosomes and Chloroplast
(B) Golgi complex and ribosomes
(C) Chloroplasts and mitochondria
(D) Ribosomes and mitochondria

Question No:11

During cell division, the spindle fibres get attached to the condensing chromosomes at a highly differentiated region. This region has

(A) Chromomere
(B) Chromocentre
(C) Centriole
(D) Kinetochore

Question No:12

Quantasome are present in

(A) Chloroplast
(B) Mitochondria
(C) Golgi body
(D) Lysosome

Question No:13

In mitochondira, enzyme cytochrome oxidase is present in

(A) Outer membrane
(B) Perimitochondrial space
(C) Inner membrane
(D) matrix

Question No:14

Which of the following plant cells is not surrounded by a cell wall ?

(A) Root hair cell
(B) Stem hair cell
(C) Gamete cell
(D) Bacterial cell

Question No:15

Which of the following cell organelles stores hydrolytic enzymes?

(A) Centriole
(B) Lysosomes
(C) Chromoplast
(D) Chloroplast

Question No:16

Which of the following cell organelles is associated with photorespiration ?

(A) Mitochondria
(B) Peroxysome
(C) Chloroplast
(D) All of these

Question No:17

The thickness of unit membrane is

(A) 20 A 0
(B) 35A 0
(C) 55A 0
(D) 75A0

Question No:18

A structure known as peroxisomes is associated with

(A) Photosynthesis
(B) Respiration
(C) Photorespiration
(D) Photo phosphorylation

Question No:19

The diagrammatic representation of a chromosome is known as

(A) Idiotype
(B) Karyotype
(C) Homotype
(D) Holotype

Question No:20

In SAT chromosome, SAT (satellite terminal part of chromosome beyond secondary constriction. It contains

(A) DNA
(B) RNA
(C) repetitive DNA
(D) none of these