Chromosomes And DNA Quiz

Created on August 01, 2022 By mdcatpk

Chromosomes And DNA Quiz

1 / 20

Which is incorrect?

Chromosomes 1st observed by Walther Fleming

Chromosomal theory of inheritance 1st formulated by Walter Sutton

1st evidence of hereditary nature of DNA provided by Friedrich Meischer

2 / 20

A chromosome is made of

2 chromatids +1 centromere +secondary constriction

1 chromatids + 1 centromere + primary constriction

2 chromatids + 1 centromere + primary constriction

3 / 20

Chromosomes are composed of

40% protein and 60% DNA

50% protein and 50% DNA

60% protein and 40% DNA

4 / 20

A typical human chromosome contains _________ nucleotides in its DNA

140 million

240 million

150 million

5 / 20

Histones have an abundance of amino acids

Arginine and lysine

Valine and lysine

Histidine and threonine

6 / 20

A torsion of chromatin that is condensed only during cell division is

Euchromatin

Heterochromatin

Biochromatin

7 / 20

Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called

Transduction

Mutation

Replication

8 / 20

Who discovered DNA?

P.A.Levene

Frederick Griffith

Friedrich Miescher

9 / 20

DNA contains

Purines (A and G) pyrimidines (U and (c)

Purines (T and (c) pyrimidines (A and G)

Purines (A and G) pyrimidines (T and (c)

10 / 20

In DNA

A forms two bonds with T

G forms three bonds with C

Both a and b

11 / 20

DNA has a helical shape with the diameter of

3 nm

4 nm

2 nm

12 / 20

In semi-conservative replication

The sequence of the original duplex is conserved after one round of replication

Generate DNA copies of entirely new molecules

Parental DNA become completely dispersed

13 / 20

The true E.Coli replicating enzyme is

DNA polymerase I

DNA polymerase II

DNA polymerase III

14 / 20

The rate of DNA replication by DNA polymerase is

1000 nucleotides / sec

2000 nucleotides / sec

150 nucleotides / sec

15 / 20

Replication always proceeds in a direction

5′ – 3′

3′ – 5′

Both directions

16 / 20

Which statement is correct?

Leading strand elongates away from the replication fork

The lagging strand is constructed discontinuously

Lagging strand elongates towards the replication fork

17 / 20

The length of Okazaki fragments in eukaryotes is

150–250 nucleotides long

200-300 nucleotides

100-200 nucleotides

18 / 20

In alkaptonuria

Patient’s urine contains homogenetic acid

Urine becomes black

Both a and b

19 / 20

The sequence of nucleotides that determines the amino acid sequence of a protein is

Gene

Chromosome

DNA

20 / 20

Central dogma is

Transfer of information from DNA to mRNA

The basic mechanism of reading and expressing genes

Transfer of information from RNA to proteins

Your score is

The average score is 0%

0%

Related Posts

Cell Wall MDCAT 2024

Rosa Moschata

Important Plant Hormone MCQs 2023

About mdcatpk