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Common features of glycogen and starch

Blood entering kidney for purification is oxygenated or deoxygenated

Deficiency of which vitamin causes xerophthalmia?

Choose the correct option based on given statments:

Assertion [A]: Wine is a product of microbial activity.

Reason [R]: Yeast ferments carbon compounds to make alcohol and carbon dioxide.

Explain somatic and germ line gene therapy.

A high BOD value in aquatic environment indicates

Why is AIDS considered to be a ‘Syndrome’ and not a disease? [ 3 MARKS ]

Which of the following is not an oviparous animal?

How can an aquarium be made into a self-sustaining unit like a natural ecosystem?

How many times the oxidation reaction occurs during the one Kreb's cycle:-

Question 3

Match the organisms in Column I with their action in Column II.

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(i\right)& \text{Bacteria}& \text{(a)}& \text{Fixing nitrogen}\\ \left(ii\right)& \text{Rhizobium}& \text{(b)}& \text{Setting of curd}\\ \left(iii\right)& \text{Lactobacillus}& \text{(c)}& \text{Baking of bread}\\ \left(iv\right)& \text{Yeast}& \text{(d)}& \text{Causing malaria}\\ \left(v\right)& \text{A protozoan}& \text{(e)}& \text{Causing cholera}\\ \left(vi\right)& \text{A virus}& \text{(f)}& \text{Causing AIDS}\\ & & \text{(g)}& \text{Producing antibodies}\end{array}$

Question 1

Which of the following is a plant hormone?



(a) Insulin

(b) Thyroxin

(c) Oestrogen

(d) Cytokinin

Oxygenated blood returns from lungs to the heart through

(क)
नवाब
साहब
द्वारा
खीरा
खाने
की
तैयारी
करने
का
एक
चित्र
प्रस्तुत
किया
गया
है।
इस
पूरी
प्रक्रिया
को
अपने
शब्दों
में
व्यक्त
कीजिए।

(ख)
किन-किन
चीज़ों
का
रसास्वादन
करने
के
लिए
आप
किस
प्रकार
की
तैयारी
करते
हैं?

Question 1

How do Mendel’s experiments show that traits may be dominant or recessive?

What is the main reason for waste becoming non-biodegradable?

The cell becomes___when it is placed in a hypertonic solution.

Question 32

Complete the crossword puzzle with the help of clues given below:

Across

1.Pollutant which was used in refrigerators and air conditioners. (18)

3.Produced on incomplete combustion of fuels (14)

6.This chemical protects our crops and is washed into water bodies from the field. (9)

Down

2.This layer protects us from harmful ultraviolet rays. (5)

4.1t is essential for combustion. (6)

5.Disease which is caused by drinking contaminated water. (7)

7. River which is famous in India and sustains most of the northern, central and eastern Indian population. (5)

Question 2

How do Mendel’s experiments show that traits are inherited independently?

Name any three life processes in multi-cellular organisms.

Fill in the blank with the correct degree of comparison.

Out of the two, Hannibal is the _____ foe.

Describe the advantages and disadvantages of cross-pollination to the plant.

Which of the following is the correct order of evolutionary history of man?

In DNA the complementary bases are________.

“I have done something; oh, God! I've done something real at last.” Why does Andrew say this? What does it mean?

What is the Fundamental difference between Homozygous and Heterozygous conditions?

The right side of the heart deals with

If sugar is detected in the urine of a person, name the disease he is suffering from.

During pollination, pollen grains get carried to___of the carpel.

what processes would you consider essential for maintaining life?

Name the part in cyanobacteria which contains chlorophyll

Long flattened, usually unbranched units arranged in parallel stacks in endoplasmic reticulum are called

The diagram below represents two reproductive cells A and B. Study the same and then answer the questions that follow :

(a) Identify the reproductive cells A and B.

(b) Name the specific part of the reproductive system where the above cells are produced.

(c) Where in the female reproductive system do these cells unite ?

(d) Name the main hormones secreted by the (1) ovary (2) testes.

(e) Name an accessory gland found in the male reproductive system and state the function of its secretion.

Select the correct option describing gonadotropin activity in a normal pregnant female: