Biology Mixed Test - 2 Online Test

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Biology Mixed Test - 2

Description: Biology Mix Test - 2
Number of Questions: 20
Created by: Naresh Verma
Tags: Biology Mix Test - 2 DNA Replication Replication of DNA DNA Finger Printing Gene Expression and Regulation Regulation of Gene Expression Translation Water Absorption Absorption of Water by Plants

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Operon model of gene regulation in bacteria was proposed by

Watson and Crick
Hershey and Chase
Meselson and Stahl
Jacob and Monad

Which of the following elements is absent in DNA?

Phosphorus
Carbon
Sulphur
Hydrogen

A strand of DNA has the sequence 5′−ATTCCG−3′. The complementary strand for this is

5′−TAAGGC−3′
5′−ATTCCG−3′
5′−ACCTTA−3′
5′−CGGAAT−3'

Which of the following is an initiation codon?

UAA
UGA
UAG
AUG

The primase is used in DNA replication for

joining okazaki fragments
the formation of new DNA
the synthesis of DNA primer
the synthesis of RNA primer

If the external solution balances the osmotic pressure of the cytoplasm of a plant cell then the solution is said to be

hypotonic
hypertonic
isotonic
isotactic

Facilitated diffusion through cell membrane

takes place through membrane proteins
sets up a concentration gradient
is dependent upon ATP
takes place without any membrane proteins

Water potential is determined by

soluble potential and osmotic potential
pressure potential
solute potential and pressure potential
solute potential

DNA fingerprinting was discovered by

Jacob and Monad
Watson and Crick
Hershey and Chase
Alec Jeffrey

The role of enzyme DNA ligase in DNA replication is

to add more nucleotides to the growing strand one at a time
to open up the two DNA strands to expose template strands
to remove incorrectly matched bases
to join okazaki fragments to one another

Which of the following statements is correct about osmosis?

It requires ATP.
It is independent of solute concentration.
It continues until the pressure potential equals the water potential.
It results in the bursting of plant cells placed in pure water.

In maltose, two glucose units are linked by a

peptide bond
hydrogen bond
glycosidic bond
phosphodiester bond

Which of the following is a protein that helps in transport of glucose across cell membrane?

GLUT 40
GLUT 4
Insulin
Glucagon

Co- enzymes differ from enzymes as

co-enzymes are polymers of amino acids
co-enzymes are small like vitamins
co-enzymes are specific for one reaction
co-enzymes always carries high-energy phosphate

Which nucleoside is formed when guanine binds with ribose?

Guanylic acid
Guanosine
Guanosine monophosphate
Guanosine triphosphate

Which of the following is the nitrogen base present only in RNA?

Adenine
Thymine
Cytosine
Uracil

Which of the following is the most abundant molecule in the cell?

Lipid
Protein
Nucleic acid
Carbohydrate

The only means of gaseous movement within a plant body is by the means of

imbibition
cyclosis
putrefaction
diffusion

In semiconservative replication of DNA,

the original double helix remains intact and a new double helix forms
the strands of the double helix seperate and act as templates for new strands
polymerisation is catalysed by RNA polymerase
polymerisation is catalysed by DNA ligase enzyme

The water potential of any solution is

zero
always less than the water potential of pure water
always having a positive value
equal to water potential of pure water

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