12th Standard English Medium Biology (Zoology) Subject Book Back 1 Mark Questions with Solution Part - I | QB365

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12th Standard English Medium Biology (Zoology) Subject Book Back 1 Mark Questions with Solution Part - I

Published on: 02/06/2021

QB365 provides detailed and simple solution for every book back questions in class 12 Biology subject.It will helps to get more idea about question pattern in every book back questions with solution.

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Std: 12th Standard - Biology

chapter: - Book back Questions

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Questions:

Multiple Choice Question

24 x 1 = 24

Match the following and choose the correct combination from the options given below.

Column I	Column II
A. Mutalism	1. Lion and deer
B. Commensalism	2. Round worm and man
C. Parasitism	3. Birds compete with squirrels for nuts
D. Competition	4. Sea anemone on hermit crab
E. Predation	5. Barnacles attached to Whales.

(a)

A- 4, B-5, C-2, D –3, E-1

(b)

A- 3, B-1, C-4, D – 2, E-5

(c)

A- 2, B-3, C-1, D – 5, E-4

(d)

A- 5, B-4, C-2, D – 3, E-1

How many amino acids are arranged in the two chains of Insulin

(a)

Chain A has 12 and Chain B has 13

(b)

Chain A has 21 and Chain B has 30 amino acids

(c)

Chain A has 20 and Chain B has 30 amino acids

(d)

Chain A has 12 and chain B has 20 amino acids.

The gases produced in anaerobic sludge digesters are

(a)

Methane, oxygen and hydrogen sulphide

(b)

Hydrogen sulphide, methane and sulphur dioxide

(c)

Hydrogen sulphide, nitrogen and methane

(d)

Methane, hydrogen sulphide and CO₂.

The purpose of biological treatment of waste water is to _______

(a)

Reduce BOD

(b)

Increase BOD

(c)

Reduce sedimentation

(d)

Increase sedimentation

The age of fossils can be determined by

(a)

electron microscope

(b)

weighing the fossils

(c)

carbon dating

(d)

analysis of bones

Who proposed the Germplasm theory?

(a)

Darwin

(b)

August Weismann

(c)

Lamarck

(d)

Alfred Wallace

Read the given statements and select the correct option.
Statement 1: Diaphragms, cervical caps and vaults are made of rubber and are inserted into the female reproductive tract to cover the cervix before coitus.
Statement 2: They are chemical barriers of conception and are reusable.

(a)

Both statements 1 and 2 are correct and statement 2 is the correct explanation of statement 1.

(b)

Both statements 1 and 2 are correct but statement 2 is not the correct explanation of statement 1.

(c)

Statement 1 is correct but statement 2 is incorrect

(d)

Both statements 1 and 2 are incorrect

Which one of the following groups includes sexually transmitted diseases caused by bacteria only?

(a)

Syphilis, gonorrhoea and candidiasis

(b)

Syphilis, chlamydiasis and gonorrhoea

(c)

Syphilis, gonorrhoea and trichomoniasis

(d)

Syphilis, trichomoniasis and pediculosis

Which of the following is the correct sequence of event with reference to the central dogma?

(a)

Transcription, Translation, Replication

(b)

Transcription, Replication, Translation

(c)

Duplication, Translation, Transcription

(d)

Replication, Transcription, Translation

10.

What is the basis for the difference in the synthesis of the leading and lagging strand of DNA molecules?

(a)

Origin of replication occurs only at the 5' end of the molecules

(b)

DNA ligase works only in the 3' → 5' direction

(c)

DNA polymerase can join new nucleotides only to the 3' end of the growing stand.

(d)

Helicases and single-strand binding proteins that work at the 5' end

11.

E. coli cell grown on ¹⁵N medium are transferred to ¹⁴N medium and allowed to grow for two generations. DNA extracted from these cells is ultracentrifuged in a cesium chloride density gradient. What density distribution of DNA would you expect in this experiment?

(a)

One high and one low density band

(b)

One intermediate density band.

(c)

One high and one intermediate density band.

(d)

One low and one intermediate density band

12.

DNA and RNA are similar with respect to _____.

(a)

Thymine as a nitrogen base

(b)

A single-stranded helix shape

(c)

Nucleotide containing sugars, nitrogen bases and phosphates

(d)

The same sequence of nucleotides for the amino acid phenyl alanine

13.

The site of embryo implantation is the _____.

(a)

Uterus

(b)

Peritoneal cavity

(c)

Vagina

(d)

Fallopian tube

14.

Which of the following is incorrect regarding ZW-ZZ type of sex determination?

(a)

It occurs in birds and some reptiles

(b)

Females are homogametic and males are heterogametic

(c)

Male produce one type of gamete

(d)

It occurs in gypsy moth

15.

Females with Turners syndrome have ______.

(a)

Small uterus

(b)

Rudimentary ovaries

(c)

Underdeveloped breasts

(d)

All of these

16.

Klinefelters syndrome is characterized by a karyotype of ____.

(a)

XYY

(b)

(c)

XXX

(d)

XXY

17.

Choose the correctly match pair.

(a)

Amphetamines - Stimulant

(b)

LSD - Narcotic

(c)

Heroin - Psychotropic

(d)

Benzodiazepine - Pain killer

18.

The Athlete’s foot disease in human is caused by _______

(a)

Bacteria

(b)

Fungi

(c)

Virus

(d)

Protozoan

19.

Animals giving birth to young ones:

(a)

Oviparous

(b)

Oviviviparous

(c)

Viviparous

(d)

Both a and b

20.

If the childs blood group is ‘O’ and fathers blood group is ‘A’ and mother’s blood group is ‘B’ the genotype of the parents will be ______.

(a)

I^A I^A and I^B I^o

(b)

I^A I^o and I^B I^o

(c)

I^A I^o and I^oI^o

(d)

I^oI^o and I^B I^B

21.

What can be the blood group of offspring when both parents have AB blood group?

(a)

AB only

(b)

A, B and AB

(c)

A, B, AB and O

(d)

A and B only

22.

Which of the following is true about Rh factor in the offspring of a parental combination DdxDd (both Rh positive)?

(a)

All will be Rh-positive

(b)

Half will be Rh positive

(c)

About ¾ will be Rh negative

(d)

About one fourth will be Rh negative

23.

Three children of a family have blood groups A, AB and B. What could be the genotypes of their parents?

(a)

I^A I^B and I^oI^o

(b)

I^A I^o and I^BI^o

(c)

I^B I^B and I^A I^A

(d)

I^A I^A and I^oI^o

24.

ABO blood group in man is controlled by _____.

(a)

Multiple alleles

(b)

Lethal genes

(c)

Sex linked genes

(d)

Y-linked genes

Assertion and reason

1 x 2 = 2

25.

In each of the following questions there are two statements. One is assertion (A) and other is reasoning (R). Mark the correct answer as
Assertion (A): Offsprings produced by asexual reproduction are genetically identical to the parent.
Reason(R): Asexual reproduction involves only mitosis and no meiosis.
Codes:
A. If both A and R are true and R is correct explanation for A
B. If both A and R are true but R is not the correct explanation for A
C. If A is true but R is false
D. If both A and R are false.

(a)

both A and R are true and R is correct explanation for A

(b)

If both A and R are true but R is not the correct explanation for A

(c)

If A is true but R is false

(d)

If both A and R are false.