Download Biology (056) (E) CHAPTER

Dr. AASHISH H. PANCHAL (M.Pharm., Ph.D.)
TRISHA INSTITUTE OF BIOLOGY
GSEB/CBSE/ISC/NEET
COMPLETE BIOLOGY SOLUTION
STD-12 (Semester-4)
Sub: Biology (056) (E)
CHAPTER-8 AND 9 (UNIT TEST 1)
Time: 15 Min.
PART-A
Marks:50
1. Excessive growth of hair on the pinna is a feature found only in males because
(A)The gene responsible for the character is recessive in females and dominant only in males
(B)The character is induced in males as males produce testosterone
(C)The female sex hormone estrogen suppresses the character in females
(D)The gene responsible for the character is present on the Y chromosome only
2. Haemophilia is more commonly seen in human males than in human females because
(A)This disease is due to a Y-linked recessive mutation
(B)This disease is due to an X-linked recessive mutation
(C)This disease is due to an X-linked dominant
(D)A greater proportion of girls die in infancy
3. If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the
flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be
(A)Both heterozygous
(B)One homozygous and other heterozygous
(C)Both homozygous
(D)Both hemizygous
4. If a colourblind woman marries a normal visioned man, their sons will be
(A)Three-fourths colourblind and one-fourth normal
(B)One-half colourblind and one-half normal
(C)All normal visioned
(D)All colourblind
5. What type of gametes will form by genotype RrYy
(A)RY, Ry, rY, ry
(B)
RY, Ry, ry, ry
(C)
Ry, Ry, Yy, ry
(D)
Rr, RR, Yy, YY
6. If two opposite alleles come together, one finding morphological expression masking the other, the fact is
described as law of
(A) Inheritance
(B) Dominance
(C)
Limiting factor (D)
Segregation
7. Mating of an organism to a double recessive in order to determine whether it is homozygous or
heterozygous for a character under consideration is called
(A)reciprocal cross
(B)test cross
(C)dihybrid cross
(D)back cross
8. When a tall plant with round seeds (TTRR) crossed with a dwarf plant with wrinkle seeds (tfrr). The F1generation
consists of tall plants with round seeds. What would be the proportion of dwarf plant with wrinkle seeds in
F1 generation?
(A)0
(B)1/2
(C)1/4
(D)1/16
9. Sickle cell anemia is
(A)Characterized by elongated sickle like RBCs with a nucleus
(B)An autosomal linked dominant trait
(C)Caused by substitution of valine by glutamic acid in the β globin chain of haemoglobin
(D)Caused by a change in a single base pair of DNA
10. Test cross of dihybrid ratio 1 : 1 : 1 : 1 then it proves that
(A)F1 hybrid produces four different progenies
(B)F1 hybrid produces two different progenies
(C)F1 hybrid is homozygous
(D)Four different progenies are produced by parents
11. Mendel's principle of segregation means that the germ cells always receive
(A)One pair of alleles
(B)One quarter of the genes
(C)One of the paired alleles
(D)Any pair of alle
12. Which one of the followings is assigned an uppercase letter?
(A)Superior allele
(B)Dominant allele
(C)Inferior allele
(D)Mutant allele
13. What is the composite display (paired and arranged according to size) of all the chromosomes of an organism
called?
(A)Linotype
(B)Karyotype
(C)Phenotype
(D)Chromotype
14. Variable number of tandem repeats (VNTRs) in the DNA molecule are highly useful in
(A)Monoclonal antibody production
(B)DNA fingerprinting
(C)Recombinant DNA technology
(D)Stemcell culture
15. In E. coli, lac operon gene Y is responcible for
(A)
β-galactosidase (B)
lactose
(C)
permease
(D)
transacetylase
16. In lac operon model; repressor protein binds to which site
(A) Regular
(B) Promotor
(C)
Operator
(D)
Structural genes
17. Okazaki fragments are synthesised on
(A) Leading strands of DNA only
(B)
Lagging strands of DNA only
(C) Both leading and lagging strands of DNA
(D)
Complementary DNA
18. If the total amount of adenine and thymine in a double-stranded DNA is 45%, the amount of guanine in this DNA
will be
(A)22.5%
(B)27.5%
(C)45%
(D)55%
M.No. : 09898715582,
E-mail: [email protected]
Page 1 of 2
Dr. AASHISH H. PANCHAL (M.Pharm., Ph.D.)
TRISHA INSTITUTE OF BIOLOGY
GSEB/CBSE/ISC/NEET
COMPLETE BIOLOGY SOLUTION
19. RNA polymerase is only capable of catalyzing the process of ______.
(A)Termination
(B)Elongation
(C)Initiation
(D)All of the above
20. HIV is classified as a retrovirus because its genetic information is carried in
(A)DNA instead of RNA
(B)DNA
(C)RNA instead of DNA
(D)Protein coat
21. ______ occurs in RNA instead of the nitrogenous base thymine found in DNA.
(A)Uracil
(B)Cytosine
(C)Guanine
(D)Ribose
22. The region of tRNA which consists of three bases complementary to a mRNA codon is ______.
(A)Codon
(B)Intron
(C)Anticodon
(D)Interferon
23. A DNA segment which serves as a kind of “on-off switch” for transcription is a/an ______.
(A)Regulator gene
(B)Operator
(C)Promoter
(D)Structural gene
24. Match the followings:
A
tRNA
1
Linking of amino acids
B
mRNA
2
Transfer of genetic information
C
rRNA
3
Nucleolar organising region
Peptidyl
D
4
Transfer of amino acid from cytoplasm of ribosome
transferase
(A)A = 4, B = 2, C = 3, D = 1
(B)A = 1, B = 4, C = 3, D = 2
(C)A = 1, B = 2, C = 3, D = 4
(D)A = 1, B = 3, C = 2, D = 4
25. Gel electrophoresis is used for
(A)Isolation of DNA molecule
(B)Cutting of DNA into fragments
(C)Separation of DNA fragments according to their size
(D)Construction of recombinant DNA by joining with cloning vectors
SECTION-A :
Answer the question no. 1 to 8, as asked. Each question carry 2 Marks
08
1. Application of DNA fingerprinting
2. If the sequence of one strand of DNA is written as follows. ATT TAT CCA GGC ATG. Write down the sequence of m RNA
and Protein OR Application of DNA fingerprinting ?
3. What is a pleiotropic gene ? and Explain briefly
4. Why should thaelassemia test be perfomed ? Explain.
SECTION-B :
Answer the question no. 9 TO 14, as asked. Each question carry 3 Marks
5. explain the sex determination in honey bees and genetic balance theory OR chromosomal disorder
6. Write a note on experiment for the DNA as a genetic material
7. Explain the Jacob and monad experiment lac operon
09
SECTION-C :
Answer the question no. 15 TO 18 as asked. Each question carry 4 Marks
8. Write a note on DNA replication. 0R Write a note on elongation of translation
9. Write a note on structural gene mutation.
1
D
11
C
21
A
M.No. : 09898715582,
2
B
12
B
22
C
3
A
13
B
23
B
ANSWER KEY
4
5
6
7
D
A
B
B
14 15 16 17
A
C
C
B
24 25
A
C
E-mail: [email protected]
8
A
18
B
9
C
19
B
08
10
A
20
C
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