Download All the following is correct about ribosomes EXCEPT

Q1) Choose the most corrected answer
1
DNA is a polymer of
a. polysaccharides.
b. amino acids.
c. fatty acids.
d. nucleotides.
2
All the following is correct about ribosomes EXCEPT
a. synthesis protein
b. attached to the outside of RER
c. composed of three subunits
d. there are two types attached and free.
3
A fat molecule is constructed from:
a. glycerol and fatty acids
b. glycerol and ethanol
c. glycerol, ethanol and fatty acids
d. fatty acids, methanol and carbon
4
In the nucleolus, ……………… is synthesised
a. ribosomal RNA
b. messenger RNA
c. transferase RNA
d. all of the above
5
Two monosaccharides can join together with a
a. peptide linkage
b. ester linkage
c. glycosydic linkage
d. ionic linkage
6
The function of the nuclear lamina is to
a. transport molecules to the nucleus
b. maintain the shape of the nucleus
c. prevent chromatin from leaving the nucleus
d. none of the above
7
Six carbon sugars are
a. pentoses
c. trioses
b. hexoses
d. tetroses
8
The main macromolecules in plasma membrane are
a. lipids and carbohydrates
b. carbohydrates and proteins
c. carbohydrates and lipoproteins
d. lipids and proteins
9
In Pompe’s disease, cells are lacking of
a. Lipid-digesting enzymes
b. protein-digesting enzymes
c. glycogen-digesting enzymes
d. nucleic acid digesting enzymes
10
Each nucleotide consists of three parts, these parts are
a. a nitrogen base, a triose sugar and a phosphate group
b. a nitrogen base, a hexose sugar and a phosphate group
c. a nitrogen base, a pentose sugar and a phosphate group
d. a nitrogen base, a pentose sugar and 2 phosphate group
11
which of the following is CORRECT about mitochondria
a. Lipid is produced
b. lysosmes are present
c. have single membrane
d. all are wrong
12
A protein’s function depends on its
a. specific conformation
b. length
c. type of bonds
d. none of the above
13
The simplest carbohydrates are
a. Disaccharides
b Polysaccharides
c. monosacchridse
d. all of the above
14
Phospholipids have……………….. attached to glycerol and a phosphate group.
a. one fatty acid
b. two fatty acids
c. three fatty acids
d. four fatty acids
15
The loss of electrons is called
a. oxidation
b. reduction
c. phosphorylation
d. glycolysis
16
Which of the following is true about starch and glycogen?
a. they are both polymers of glucose
b. they are both used for energy storage in plants
c. they are both found in humans
d. none of them
17
When a metabolic pathway is turned off by its end product., its called
a. reverse inhibition
b. feedback inhibition
c. forward inhibition
d. irreversible inhibition
18
The protein molecule is composed of
a fatty acids
b nucleic acids
c monosaccharides
d none of them
19
Hydrocarbons are organic molecules that consist of only
a. carbon and hydrogen atoms
b. carbon and nitrogen
c. carbon, hydrogen and oxygen
d. carbon and oxygen
20
Carbon chains form the skeletons of most organic molecules, the skeletons may be
a. straight only
b. branched only
c. arranged in closed rings only
d. All of them
Q2) True or False
1
A catalyst is a chemical agent that changes the rate of a reaction and consumed.
2
The outer mitochondrial membrane form cristae.
3
The lysosomal enzymes work best in basic environment.
4
There are three types of ribosomes, free, attached, and moving.
5
The denaturated protein is biologically active.
6
Most of animal fats are unsaturated.
7
The changes in temperature will not affect the activity of enzymes.
8
There are three major populations of membrane proteins.
9
Saturated fatty acids have only single bonds between the carbon atoms.
10 Glycogen is built up of many units of galactose.