The main difference between active and passive transport across cell membrane is :
1. | passive transport is non-selective whereas active transport is selective |
2. | passive transport requires a concentration gradient across a biological membrane whereas active transport requires energy to move solutes. |
3. | passive transport is confined to anionic carrier proteins whereas active transport is confined to cationic channel. |
4. | active transport occurs more rapidly than passive |
Match the items given in Column - I with those in Column - II and choose the correct option:
Column-I | Column-II | ||
(a) | Rennin | (i) | Vitamin B12 |
(b) | Enterokinase | (ii) | Facilitated transport |
(c) | Oxyntic cells | (iii) | Milk proteins |
(d) | Fructose | (iv) | Trypsinogen |
Options: | (a) | (b) | (c) | (d) |
1. | iii | iv | ii | i |
2. | iv | iii | i | ii |
3. | iv | iii | ii | i |
4. | iii | iv | i | ii |
Kwashiorkor disease is due to:
1. | simultaneous deficiency of proteins and fats |
2. | simultaneous deficiency of proteins and calories |
3. | deficiency of carbohydrates |
4. | protein deficiency not accompanied by calorie deficiency |
Select the correct sequence of events.
1. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell division (Cleavage) → Cell differentiation → Organogenesis |
2. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell division (Cleavage) → Organogenesis → Cell differentiation |
3. | Gametogenesis → Syngamy → Gamete transfer → Zygote → Cell division (Cleavage) → Cell differentiation → Organogenesis |
4. | Gametogenesis → Gamete transfer → Syngamy → Zygote → Cell differentiation → Cell division (Cleavage) → Organogenesis |
Among the following, which hydrolysis reaction occurs at the slowest rate:
1. | |
2. | |
3. | |
4. |
Which of the following hormones is responsible for both the milk ejection reflex and the foetal ejection reflex?
1. | Estrogen | 2. | Prolactin |
3. | Oxytocin | 4. | Relaxin |
The vapor of secondary alcohol passed over heated copper at 573 K yield:
1. | A carboxylic acid | 2. | An aldehyde |
3. | A ketone | 4. | An alkene |
No new follicles develop in the luteal phase of the menstrual cycle because :
1. | Follicles do not remain in the ovary after ovulation |
2. | FSH levels are high in the luteal phase |
3. | LH levels are high in the luteal phase |
4. | Both FSH and LH levels are low in the luteal phase |
In Australia, marsupials and placental mammals have evolved to share many similar characteristics. This type of evolution may be referred to as :
1. Adaptive Radiation
2. Divergent Evolution
3. Cyclical Evolution
4. Convergent Evolution
Match the items of Column - I with Column - II :
Column-I | Column-II | ||
(a) | XX-XO method of sex determination | (i) | Turner's syndrome |
(b) | XX-XY method of sex Determination | (ii) | Female heterogametic |
(c) | Karyotype-45 | (iii) | Grasshopper |
(d) | ZW-ZZ method of Sex Determination | (iv) | Female homogametic |
Select the correct option from the following:
(a) | (b) | (c) | (d) | |
1. | (ii) | (iv) | (i) | (iii) |
2. | (i) | (iv) | (ii) | (iii) |
3. | (iii) | (iv) | (i) | (ii) |
4. | (iv) | (ii) | (i) | (iii) |